# Statistics

### Featured Answers

### Organizing and Summarizing Data

- What is Statistics?
- Measures of Center
- Measures of Variability
- Categorical Graphs
- Simple Quantitative Displays
- Frequency Distribution
- The Histogram
- Measuring Relative Position
- Boxplots
- Linear Transformations
- Sampling Techniques
- Observational Studies, Experiments, and Surveys
- Experimental Design
- Basic Probability Concepts
- Combinations and Permutations
- Addition Rule
- Multiplication Rule
- Conditional Probability
- Venn Diagrams and Tree Diagrams
- Two-Way Tables
- Uniform Distribution
- The Standard Normal Distribution
- Real-Life Applications of the Normal Distribution
- Assessing Normality
- Probability Distribution
- Mean and Standard Deviation of a Probability Distribution
- Law of Large Numbers
- Addition Rules for Variances
- Properties of a Binomial Experiment
- Calculating Binomial Probabilities
- Geometric Probabilities
- Sampling Distribution and Statistics
- Sampling Distribution of a Proportion
- Central Limit Theorem
- Confidence Intervals
- Hypothesis Testing
- Statistical Significance
- Type I and Type II Errors
- One-sample z test
- Two-sample z test
- z Confidence intervals for the Mean
- One-sample t test
- Matched-pair t test
- Two-sample t test
- t Confidence intervals for the Mean
- Confidence Intervals for p
- One-sample Hypothesis Test for p
- Two-sample Hypothesis Test for p
- Chi-Square Distribution
- Goodness of Fit Test
- Chi-Square Tests for Independence and Homogeneity
- Independent and Dependent Variables
- Least Squares Regression Line (LSRL)
- Residual Plots and Outliers
- Correlation and Coefficient of Determination
- Confidence Interval for the Slope
- t Test for the Slope and the Correlation Coefficient
- Prediction Intervals
- Hypothesis Testing for the Standard Deviation
- Nonlinear Transformations of Data
- Nonparametric Statistics
- Analysis of Variance
- Statistics question?
- How can i find the probability of obtaining certain results?(very urgent for anupcoming test, details inside)
- A spinner has equal sections numbered 1-8. If you spin the spinner once, what is the probability that you will not get a 5?
- In a survey of men in the United States (ages 20-29), the mean height was 69.6 inches with a standard deviation of 3.0 inches. If 320 men are randomly selected, about how many of them are taller than 71 inches?
- Are population means score in statistics different between 2006 and 2016 students? ( Help ) (Stats)
- Can someone please help me with this question?
- A coin is tossed 8 times. Find the probability of getting at most 5 heads?
- The standard deviation of 1,2,3,....25 is?
- A football coach wants to see how many laps his players can run in 15 minutes. During a non-mandatory meeting, the coach asks for volunteers on his team to do the experiment. Which sentences explain how randomization is not applied in this situation?
- Which statement is true about the population of the town?
- What is the correct classification for each statement?
- Michael has a drawer with 8 pairs of black socks and 12 pairs of white socks. Without looking he takes a white pair of socks out of the drawer. What is the probability that the next pair he takes out is white?
- You roll a green number cube and a gold number cube both are standard number cube (1-6) what is the probability that the sum is 9?
- A school contest has every student pick 4 different numbers from 1-10. If you pick the correct 4 numbers, you get a day off of school. What is your probability of winning?
- The mean of a set of six numbers is 4.5. If the mean of two of the numbers is 5.5, find the mean of the remaining four numbers? Show your work.
- A test consist of 20 questions, but you are told to answer only 15. in how many different ways can you choose the 15 questions?
- P(E) = 0.5 and P(F) = 0.6. Which of the following is true of P(E and F)?
- You are rolling two dice at the same time. What is the probability of rolling a sum of 5 or 9?
- I've forgotten how to do this type of question? Question below...
- You roll a number cube.find the probability that the number rolled is a 4?
- What's ⁿ⁺¹c₅+ⁿ⁺²c₅+ⁿ⁺³c₅+ⁿ⁺⁴c₅ ?
- What is the mean for 2,5,3,8,0,4,2,7,3?
- Consider a standard deck of 52 cards. How many 5 card hands have 2 pairs in them?
- If a standard cube is rolled what is the probability of it landing on less than 5 ?
- How many possible ways to vote?
- You roll a number cube one time. what is the probability that you roll a 3 or 4 ?
- In a certain country 12% of houses have solar heating. 19 houses are chosen at random. Find the probability that fewer than 4 houses have solar heating. the answer is in the picture ,the thing i don't understanding is from where did the brought 0.88 ?
- How many different 7-card hands include the ace and king of spades?
- There are 8 jelly beans in a bag. the probability of randomly picking two orange jellybeans without replacement is 3/14. how many orange jellybeans are in the bag?
- How do i graph this table as a clustered bar graph on excel? I can't get it work.
- Statistics question?
- How do you write an algebraic expression for: the number of sheep should not be more than 4?
- A bag contains 15 balls. 9 white , 4 black and 2 green. a)We pick 7 balls. Whats the probability that the balls color ratio will be the same as in the bag ?
- How do I do this please?
- How do I do this? See picture below. Thanks
- Please help with?
- A bag contains 15 balls. 9 white , 4 black and 2 green. a)We pick 2 balls. Whats the probability of the balls to be different colors? b)We pick 3 balls. Whats the probability of the balls to be different colors?
- What is the probability of getting exactly #2# three's when rolling #4# fair, #6#-sided die?
- A bag has four green marbles, three red marbles, and three yellow marbles. What is the probability that you pick a red marble, do not replace it, and pick another red marble?
- Ms. Edwards is redecorating her office. She has a choice of 6 colors of paint, 3 kinds of curtains, and 4 colors of carpet. How many different ways are there to redecorate?
- Fourteen people are entered in a race. If there are no ties, how many ways can the first three places come out?
- Can someone help me with this PROBABILITY question? Please.
- What is the probability of Donny getting a passing score?
- You have the numbers 1-24 written on a slip of paper. If you chose one slip at random what is the probability that you will not select a number which is divisible by 6?
- A cube has six sides that are numbered 1 to 6. The sides numbered 1, 2, and 5 are green, and the sides numbered 3, 4, and 6 are red. What is the probability of rolling the cube and getting a green or even number?
- Please can you help with a question on probability from the Venn diagram given. ?
- Can somebody please help me quick?
- A yogurt shop sells #7# flavors of frozen yogurt and #11# different toppings. How many choices are possible for a single serving of frozen yogurt with one topping?
- If I have nine cards, 3 red, 4 blue, and 2 purple, what is the probability of drawing two of the same card?
- What is the complementary event of A?What are the probabilities of A and its complement?
- Suppose you choose a marble from a bag containing 3 red marbles, 3 white marbles, and 5 blue marbles. you return the first marble to the bag and then choose again. find P(red then blue) what is the probability ?
- Bill and two other people play a game where the first to roll an even number using a standard number cube wins. What's the probability that Bill, by going first, wins?
- In how many ways can 3 singers be selected from 5 who came to an audition?
- What are the answers and how do you solve them?
- Jude has a deck of playing cards. He is asked to remove one card at random, then a second card. What could Jude do between the events to ensure they are dependent?
- A restaurant offerd a choice of 4 salads, 9 mains courses, and 3 desserts. How many possible 3- course meals are there?
- A bank requires that its customers create a PIN to access their account. The PIN must be 2 letters followed by 2 numbers. How many unique PINs are there? A 520 C 67,600 B 10,000 D 456,976
- If we rearrange the letters in the word "strange", what is the ratio of rearrangements where the vowels are not together to the rearrangements where they are together?
- A bag containing 2 ref checkers and 6 black checkers. a checker is selected kept out of the bag, and then another checker is selected. what is P(black,then red)?
- A particular driving test examiner is known to fail half of all individuals whom he examines. For a session he will examine 4 candidates. What is the expected proportion of the 4 who will pass?
- How do I Find P ( 2 < X < 7 )? (Stats)
- If there are 36 students in a class, and 20 of them are girls. If a student is selected random from the class,what is the probability that the selected students is a girl?
- How do you find the median?
- Minimum and maximum value of 13 cosx+3root3sinx-4?
- How many permutations are there in the letters beat?
- Two dice are rolled, what is the probability that their sum will be less than 13?
- Joel has an MP3 player that randomly selecs a song for him. The MP3 player has 2 classical songs, 13 rock songs, and 5 rap songs on it. What is the probability of picking either a rock or classical song?
- There are 8 cars in a parking lot on a very cold day. Suppose the probability of any of them not starting is 0.13. What is the probability that exactly 2 of the cars will not start?
- What are the steps to find the lower and upper quartiles of a data set?
- What are the answers and how do you solve them?
- How many different arrangements can be made with the letters from the word SPACE?
- If I am trying to draw a queen from a deck of 52 cards and I have drawn one card with no luck, what is my probability of drawing a queen now?
- A card is pulled from the deck, what is the probability it will be the ace of spades?
- Cam can't figure out what to eat. He is going to randomly select a piece of fruit from his pantry. There are 4 apples and 5 bananas in his pantry. What is the probability of picking an apple?
- A possible result in a probability experiment is a(n) __________.?
- A card is drawn from a deck, what is the probability that it will be a diamond?
- A bag contains 10 marbles: 3 are green, 5 are red, and 2 are blue. Goran chooses a marble at random, and without putting it back, chooses another one at random. What is the probability that the first marble is red and the second is blue?
- In a casino game based on a six-sided die, you have to pay the owner of the casino table $8 if the number on the die is even. What is the maximum amount that the table owner can make if he rolls the die 60 times?
- Please Help With My Math Homework...?
- Three research departments have 10,6, and 9 members , respectively.each department is to select a delegate and an alternate to represent the department at a conference. In how many ways can this be done ?
- The Frozen Yogurt Shoppe sells 12 different flavors of frozen yogurt. Mia orders a bowl that contains 3 different scoops of yogurt. How many different bowls of frozen yogurt may Mia order?
- Find P(F or G) using the basic addition rule ?
- How do you find the probability of picking a diamond from a standard deck of cards which has 13 cards in each of four suits: spades, hearts, diamonds, and clubs, in a simplified fraction?
- What is the probability of getting a sum of either 7, 11, or 12 on a roll of two dice?
- There are 20 students in a class with 7 boys . (a) In how many different ways can a team of 2 boys and 6 girls formed ? (b) In how many different ways can a team of 6 be formed such that there is a least one boy and at least one girl in the team ?
- What is the mode for the sample 3, 2, 5, 7, 3, 2, 6, 4, 3, 7, 2, 4, 3, 5, 7, 5, 1, 2, 5, 3,7 ?
- ?The question is based on a 52 card deck without Jokers. Find the probability of drawing a 10 of Clubs.
- If x~P(λ) show that var(x)= λ without using moment generating function of X ?
- On Monday a park event has 150 visitors. On Tuesday it has 260 visitors. Using this rate of increase estimate the count of visitors for Wednesday?
- Below is a set of data representing the percentage of females in the labor force of several countries in 1995. Choose the box-and-whisker plot for this data set. 43, 46, 48, 44, 47, 43, 48, 42, 50 ?
- Can someone help me with this question?
- Find the moment generating function,mean and variance when the pdf of x is defined by #f(x)=(1/3)(2/3)^x. ; x=0,1,2,3,.... # ?
- Use the following sample data to fond the standard deviation: -1, 0, 2, 3, 7, 10, 10?
- What is the probability of rolling an odd on a number cube?
- According to the general equal conditional probability, if P (A B) = 2/3 and P (B) = 3/4, what is P (A|B). what is the answer?? A. 35/36 B.15/16 C.8/9 D.24/25
- A bag contains 10 red marbles, 5 gray marbles, 12 black marbles, and 8 white marbles. Two marbles are randomly drawn from the bag without replacement. What is the probability of drawing a black marble followed by a red marble?
- Find the number of ways to listen to four CDs from a selection of 8 CDs.? A. 1680 B. 336 C. 70 D. 50
- For tossing a coin 20 times and and getting 4 head as an outcome... how do we get 4845?
- A card is selected at random from a normal pack of cards. The cards are replaced each time. What is the expected number of times you would select a king from 260 trials?
- A fair coin is tossed 3 times. The probability of throwing 3 tails = 0.125, two tails = 0.375 and 1 tails = 0.375. What is the probability of throwing 1 head?
- Which value is NOT always a number in the data set it represents? confuseeddd please answer!
- A jar contains five white and six red jelly beans. Kylie takes a bean at random and eats it. She then takes another jelly bean and eats it. What is the probability of the first bean eaten is white?
- Of all registered automobiles in a certain state. 10% violate the state emissions standard. Twelve automobiles are selected at random to undergo an emission test. How to find the probability that exactly three of them violate the standard?
- From a normal pack of 52 playing cards, one card is selected at random. How can I find the probability of the card being either a black card or an ace?
- How do you calculate the mean, median, and mode of 7, 3, 2, 1, 13, 8, 1, 5, 14, 11, 15?
- Let X be a normally distributed random variable with μ= 100 and σ= 10. Find the probability that X is between 70 and 110. (Round your answer to the nearest whole number percent and include the percent symbol.) ?
- How can I find the probability?
- How to calculate the mean of probability?
- I have three distinct mystery novels, three distinct fantasy novels, and three distinct biographies. I'm going on vacation, and I want to take two books of different genres. How many possible pairs can I choose?
- What is the probability that a student who does not like watching television also does not like reading? (See document)
- What is the probability of rolling two even numbers in one roll of a pair of dice?
- What is the probability of winning in the following infinitely repeated game?
- A drawer contains 8 black socks and 8 white. Two are pulled out randomly: I) probability that it is the same colour? II) how many will have to be pulled out for matching pairs?
- A survey of showed that 6% of families-1 child, 38% -2, 42%-3 and 10%-3 or more. A family is selected at random. What is the probability that it has some children?
- The first round of the 2010 FIFA World Cup consisted of several groups of four teams each. Within each group, each of the four teams played each other once. How many matches were there in each group?
- If X is a random variable such that E#(X^2)# = E(X) = 1, then what is E#(X^100)# ?
- Why are class boundaries necessary for grouped data?
- How to find 95% margin of error from 95% confidence interval?
- How many different 7-digit positive integers exist? (Note that we don't allow "7-digit" integers that start with 0, such as 0123456; this is actually a 6-digit integer.)
- What is the probability of drawing a heart from a deck of cards?
- Assume that a procedure yields a binomial distribution with a trial repeated n times. Use the binomial probability formula to find the probability of x successes given the probability p of success on a single trial. n =12, x= 5, p=0.25?
- A bag contains 30 discs: 10red, 10green, 10yellow. i) If 3 are drawn out in succession and not replaced, what is the probability of drawing 2 reds and 1yellow in that order? ii) If each disc is replaced after drawing what would the answer be now
- Find the number of 4-digit numbers greater than 3000 that can be formed from prime numbers from 1 to 10 without repetitions. ( Can't solve by listing out the possible outcomes without calculations )?
- From a group of 7 men and 5 women, a 4-person committee is to be chosen at random. What is the probability that it will have 2 men and 2 women?
- How can i calculate the following statistics inside a round area of meteors fall(tricky question)? (details inside)
- How can i calculate the odds of a current passing in an electrical circuit in regards to a certain switch?
- How can i calculate the probability of waiting for a certain bus to come? Difficult but interesting
- Find the mean, mode, and median of the data set. Round to the nearest tenth? 15,13,9,9,7,1,11,10,13,1,13?
- In how many ways can 15 basketball players be listed in a program?
- What are the possible outcomes when the coin tossed 20 times?
- How can i calculate the given events? (details inside, a bit complicated for me)
- What is circular permutation? give some examples also
- State the probability that a throw of an unbiased die will result in a score of 3 or more?
- You roll a number cube twice. What is the probability of rolling an even number and a 5?
- A card is selected at random from an ordinary pack of 52 Playing cards. State the probability (i) that the card is a club, (ii) that the card is either a club or an ace (or Both)?
- There were 10 wet days in June last year. If the name of an individual is selected at random from a directory, write down the probability that his or her birthday last year was on a wet June day. Assume all birthdays are equally liked?
- How can I find the following properties of 2 dice thrown? (details inside)
- Assume that the probability that a baby will be a boy is 0.6. Calculate the probabilities that the first two children in the family will be i) boys ii)of the same sex?
- A bag contains #10# red and # 6# black cubes. Take any random cube from the bag and do not replace it. Then we draw another cube and we do not put it back in the bag. Calculate the probability that ?
- The probability that an individual is left handed is 0.12, there are 39 students in the class.?
- How to find the probability for this question? (see details below)
- What are the minimum, first quartile, median, third quartile, and maximum of the data set?
- What is a correlation? and what is a causation/ what is the difference and what are examples of both?
- Can someone please help me with this tricky question in statistics??
- In how many ways can four people sit in a row of five chairs?
- A secretary introduces 9 letters in 9 envelopes. Let X be the random variable representing the number of letters that entered the correct envelope. How you find #E(X)# and #var(X)#?
- How to use bionominal distribution on independent variables?
- Probability: the probability that exactly one fifth of the citizens selected are vegetarians?
- Four coins are tossed and the number of heads is counted?
- P(B)= 9/20 P(A and B)= 9/100 P(A)=?
- I need help, can u help me?
- There are 5 blue crayons, 7 yellow crayons, and 8 red crayons. in a box. If one is randomly drawn and replaced 15 times, find the probability of drawing exactly four blue crayons?
- A die is rolled 8 times. What is the probability of getting exactly three 6's?
- In hockey, Ed makes 7 goals for every 10 shots. If he takes 6 shots, what is the probability that he will make at least 5 goals?
- A coin is tossed 14 times. What is the probability of getting heads exactly 5 times?
- If the probability is 2/3 then what is the odds ?
- There are 14 standbys who hope to get on your flight to Hawaii, but only 6 seats are available on the Plane. How many different ways can the 6 people be selected?
- Sally is spinning a spinner with the numbers 1-8 with equal size sections. If she spins the spinner 1 time, what is the probability that she will land on a prime number? Also, find the complement of this event.
- Evaluate 11P4?
- Given a normal deck of # 52 # cards. If I draw five cards from the deck, what is the probability that all five cards are evenly divisible by # 3? # (assume jacks, queens, kings, and aces to not be divisible by # 3#
- How many four-digit even numbers can be formed using the digits 3,4,7,8 if digits may be repeated?
- What is the average of 92, 63, 77, and 89?
- Find the number of possible arrangements of the letters in the word PENCILS if 'E' comes before 'I' ?
- Need your help in probability problems? Thanks :)
- How do you find the mode and range of 2,2,5,6?
- How do you find the median of 4 numbers?
- A teacher needs to select two students from a class of 25 students to volunteer for a demonstration. How many ways can the teacher choose those students?
- What is the CRITICAL VALUE for a one-tailed t-test with df=54 and α=.05 ?
- What is the % variation in the food energy content in a packet chips? Full question in the description box.
- A bag has 4 green marbles, 3 marbles, and 3 yellow marbles. What is the probability that you pick a red marble, do not replace it, and pick a yellow marble?
- A fair coin is tossed 20 times. What is the probability of getting at most 18 heads??
- Spin a spinner numbered 1-8 and you land on 8 twice in a row what is the probability?
- If a spinner is divided into 8 equal sections and you spin it twice, what is the probability of spinning a sum of 7?
- Of 200 students surveyed, 120 students liked Soda, 75 students liked juice, and 190 students liked soda or juice. How many students liked soda and juice?
- A standard deck of 52 cards consist of 13 hearts, 13 diamonds, 13 clubs, and 13 spades. if four cards are randomly selected without replacement, what is the probability that all four cards are hearts ?
- Probability- In a certain population, 7% of the people have Rh-positive blood. In a sample of 6 people from this population a) What is the probability that none have Rh-positive blood? b) What is the probability that 5 or less people have Rh-positive?
- In how many ways can the letters in “Mississippi” be arranged?
- How can i solve this tricky question in statistics? (details inside, tricky for me)
- On a Sunday morning 8:00-9:00, the total number of cars (X) passing a roundabout has a Poisson distribution. If it is found P(X = 4) = 3 x P(X = 3) (i.e. the probability of 4 cars passing = 3 x Probability of 3 cars passing). Calculate the p( x= 0)?
- In your guessing game the player is allowed to guess the random number in #5# tries. What are the minimum number of tries you can allow a player if you want him/ her to win every time with a #100%# probability?
- A customer ordered sixteen zingers. Zingers are placed in packages of four, three, or one. In how many different ways can this order be filled?
- A group of twenty female and twenty male students are in a room. If eight of the #40# are selected at random and put in a row for a picture, what is the probability that the eight are of the same gender?
- I am bad at probability questions. Please help me?
- The scenario may be considered which of the following?
- In how many ways can the digits in the number 6759957 be arranged?
- In how many ways can four men and four women be seated around a circular table if each man must be flanked by two women?
- How many three digit numbers can be formed using only the numbers 1 to 7 if the number 2 must be included?
- An Air Niugini aircraft have been found to take an average of 55 minutes flying time to travel from Lae to Port Moresby, with a variance of 16 minutes squared. a) Suppose that 30 flights are chosen at random and the time taken by each flight is recorded?
- How many ways can the word math be arranged?
- Find the average (the mean) of 7 11 4 6 2?
- The probability that a student Mr.x passes Mathematics is 2/3, the probability that he passes statistics is 4/9. if the probability of passing at least one subject is 4/5, what is the probability that Mr.X will pass both the subject?
- A box contains 100 copper plugs, 27 of which are oversize and 16 are under size. A plug is taken from the box, tested and replaced: a second plug is then similarly treated. Determine the probability that?
- A spinner has the numbers 1 through 9. The spinner is spun once. What is #P(3,6, 8)#?
- Can someone help me with this?
- Eight cars, each of a different color (red, blue, black, grey, white, green, tan, gold), travel one behind the other to a campground, The red car must lead and the green car must be last. How many different orderings of the cars are there?
- There are 11 tokens in a bag. 6 of them are green 5 of them are red some more red tokens are put into the bag. a token is taken out from the bag at random. the probability that the counter is red is 3/5 How many red tokens where put in the bag ?
- How can i know how to calculate the odds of a current passing in an electrical circuit?
- The mean of a set of data is -2.14 and its standard deviation is 3.94. Find the z score for a value of 5.40?
- A chi-square test for independence step by step explanation please?
- How do you evaluate 10c3?
- There are 11 pens in a box. 8 are black and 3 are red. Two pens are taken out without replacement. Work out the probability that two pens are the same colour? (4 marks)
- Casle, Matthew, Nick, Breayn, and Monika are all running for the president, vice president, and secretary for the Spanish Club. How many possible ways can these students be chosen for the positions?
- Two dice are rolled. The first die shows "1," so its outcome is known. However, the other die rolls under the table where it cannot be seen. What is the probability that both of the dice show "1"?
- A test consists of nine true/false questions. A student who forgot to study guesses rendomly on every question. What is the probability that the student answers at least two questions correctly?
- If I cannot put 2 successive black blocks on top of white and black blocks, In how many different ways can you build a tour of blocks of height N?
- How can i find the probability of pulling a coin out of a jar? (details inside)
- The mean height of 8 male subjects in a room is 177.62 cm. One subject leaves the room. The mean height is now 176.42 cm. What is the height of the male who left the room?
- Three digits are formed in 0,1,2,4,5,6 and 7 if digits os not repeated ? How many are the numbers
- In a batch of 840 calculators, 10 were found to be defective. What is the probability that a calculator chosen at random will be defective? Write the probability as a percent. Round to the nearest tenth of a percent if necessary.
- Stats help?
- If P(A)=1/4,P(B)=1/3 and P(A∪B)=1/2 find the values of 1. P(A∩B) 2. P(A∩B') 3. P(A'∩B') ?
- Combinations and permutations?
- Max has 4 blue shirts, 3 red shirts, and 5 striped shirts. What is the probability that he will select a red shirt and then a striped shirt without replacement?
- Find the area under the standard normal curve between z=0 and z=3?
- How do you find the cumulative distribution? ( Stats )
- In which distributions does the variable X have a binomial distribution?
- A student has earned the following scores on four 100-point tests this marking period: 63, 72, 88, and 91. What score must the student earn on the fifth and final test of the marking period to earn an average test grade of 80 for the five tests?
- Two cards are drawn without replacement from a standard deck of 52 playing cards. What is the probability of choosing a queen for the second card drawn, if the first card, drawn without replacement, was a king?
- Two cards are drawn without replacement from a standard deck of 52 playing cards. What is the probability of choosing a jack and then, without replacement, another jack?
- How do I show that the probability of it being blue is 5/28 ?
- If there are 20 values in a data set in order from smallest to largest, what is the median of the data set?
- What is the area between z= 2.11 and z = 2.49?
- Find out which total scores between 80 and 100 are impossible to achieve?
- Cynthia decides she is going to purchase a used passenger car. Her grandparents agree to pay for 50% of the passenger car. To get an idea of prices Cynthia looks at listings in a local used automobile publication and on a local internet site?
- At a certain breakfast restaurant, the probability of a customer ordering coffee is 0.8. When the restaurant seats two new customers, X is the number of customers ordering coffee. What is P(X=0)? Enter your answer, as a decimal, in the box. P(X=0) =
- X is the number of times the dial lands on region A. Which table represents the probability distribution for the variable X?
- Assume that there are 2 trials. X = 2 where X represents the number of successes. Which probability matches the probability histogram? Round the answer to one decimal place. P(success)=0.2 P(success)=0.4 P(success)=0.6 P(success)=0.8
- There are 25 horses and we're looking for the 1st, 2nd, and 3rd fastest horses. We can race the horses 5 at a time. What is the minimum number of races we need to find the fastest horses?
- How many distinct ways can the eleven letters in the word "TALLAHASSEE" be arranged?
- A federal report stated that 88% of children under 18 were covered by health insurance in 2000. How large a sample is needed to estimate the true proportion of covered children with 90% confidence with a confidence interval of .05 wide?
- 12) Jenny has 10 tops, 6 bottoms, 3 belts, and 5 pairs of shoes. Assuming that everything matches, how many different outfits can Jenny create?
- 11) A 10 member club is getting ready to select a president and secretary. Assuming that the same person cannot hold each job, how many ways can the offices be filled?
- When Is The Median Of A Set Of Data One Of The Numbers Of The Data Set? B.Only If There Is An Odd Number Of Elements. C.Only If There Is An Even Number Of Elements *Write In A Sentences Of Why The Answer Is Correct.
- If a 5-card hand is dealt from a deck of 52 cards, how many hands have cards that are all the same colour?
- A six-sided number cube is rolled five times, X is the number of times an even number is rolled. Which statement is true about this situation?
- If 8% of all people in an area are unemployed, what is the probability that in a sample of 200 persons, there are fewer than 10 people who are unemployed?
- Which of the following statements are true?Give reasons for your answers. (i)In a Binomial Distribution if mean is known then standard deviation is also known. (ii)If two events are mutually exclusive then they are independent.
- Alice randomly selects a permutation of #(1, 2,\cdots\ \cdots\ , 74, 75).# What is the probability that she selects a permutation where #75# precedes 7?# ##" "## # (Note: In the permutation #[1, 4, 5, 6, 3, 2], 4# precedes #2#.)
- A license plate composed of 3 letters followed by 4 digits. How many different license plates are possible?
- Alan, Betty and Carol are applying for three different jobs in a company. The probability that Alan gets his job is 0.5; the probability that Betty gets her job is 0.75; the probability that Carol gets her job is 0.3. Can anyone solve this?
- Records show that the probability is 0.00006 that a car will have a flat tire while driving through a certain tunnel.Find the probability that at least 2 of 10,000 cars passing through this channel will have flat tires?
- A one-year insurance policy pays $10822 if the policyholder dies within one year. The premium paid by the policyholder is $351, and the probability of death within that year is 0.006. What is the expected gain of the policy for the insurance company?
- A cooler at a soccer game holds 10 apple juices and 10 orange juices. If the first player chooses a juice and drinks it, then the second player chooses a juice, what is the probability that both players would choose orange juice?
- A contractor is considering a sale that promise a profit of $33,000 with a probability of 0.7 of $16,000 with a probability of 0.3 what is the expected profit?
- A bag contains 15 red 39 blue and 11 green with out replacement what probability that she will chose 2 blue write answer as a decimal?
- Are There Any Outlines?Explain How You Know And Show Any Necessary Work. (Min:14,Q1:25,Median:34,Q3:40,Max:60) *Write In A Sentence Of Why The Answer Is Correct.
- What Word Describes The Set Of Data Below? 1,1,1,2,3,5,7,7,7,8,10,11,11,15 b.This Set Has 2 Mode(bimodal) C.This Set Has More than 2 modes(multimodal) *Write In A Sentence Of Why The Answer Is Correct.
- Approximately What Percentage Of Students Had Between 5 And 8 Assignments In A Week? -(Min:3,Q1:5,Median:8,Q3:9,Max:14) Write In A Sentence Why The Answer Is Correct.
- What is the mean and median of 12,9,13,12,10,12,11,13?
- Two dice are rolled. What is the probability that the sum of the numbers rolled is either 7 or 10?
- There are 200 students in the 7th class at Manchester Middle School. Of these students, 22% play football and 12% play baseball. Eight students play on both teams. What is the probability that a student plays either football or baseball?
- A bag contains tickets numbered 1 to 30.Three tickets are drawn at random from the bag.Find the probability that the maximum number on the selected tickets exceeds 25?
- Can someone help me with this problem?
- Can someone explain in few sentences, what these terms in statistic means? Descriptive statisics, Pareto diagram, outliers, contingency table, hypothesis testing and multiple regression analysis. What is the purpose of these terms?
- The probability of succeeding is P(S)= 0.2, the probability of not succeeding is P(U) 0.8. 1. What is the probability of succeeding on the 2nd trial given that previous was not succeeding?
- Kids were asked if they have traveled to Euro. 68 kids indicated that they have traveled to Euro and 124 kids said that they have not traveled to Europe. If a kid is randomly selected, what is the probability of getting a a kid who went to Euro?
- What is the probability of grabbing #4# cherry jelly beans from a jar containing #38# jelly beans, of which #14# are cherry beans?
- A standard deck contains 52 cards, four of which are aces. If you are randomly dealt a five-card hand, what is the probability of having exactly three aces?
- The standard deviation is 15. If a sample of 100 people is selected, compute the standard error of the mean. What size sample is necessary to double the standard error of the mean?
- X. : 1. 3. 6. 7 P(X) : 0.35. Y. 0.15. 0.2 Find the value of y ? Find the mean (expected value ) ? Find the standard deviation ?
- Help me to solve this problem please? I really need help to solve about joint probability mass function..
- Would you be so kind help me to solve about probability density function? I really need help to solve my exercise about probability density function. Thank you very much before.
- A poker hand consisting of 5 cards, is dealt from pack of 52 cards. Find the probability of obtaining: a) 1 pair b) 2 pairs c) 3 of a kind d) 4 of a kind e) a flush f) a royal flush?
- Find the nos of four digit nos divisible by 4 obtained using 1,2,3,4,5 without repetation?
- A continuous random variable X has the p.d.f. F(x)={Ax(6-x)² if 0<x<6 ,{0 if otherwise Calculate the mean and standard deviation of X.Construct the distribution function F(x) and hence evaluate P(X>1/4).?
- What is the z-number associated with a 91% level of confidence? (In two decimal places)
- For a population of size N=120 with a mean of 7.5 and a standard deviation of 1.5, find the estimated standard error of the mean for the following sample sizes:(i)n=9 (ii)n=25 ?
- Statistics help?
- What is the probability of 5 Sunday in the month of October?
- Monty has to make his own dinner. he chooses 1 vegetable , 1 meat , and 1 drink. he has 3 vegetables to choose from, 3 meats, and 2 drinks. how many different dinner combinations there can be?
- In how many ways can 5 girls be seated in a row of 5 seats?
- Verify that f(x)=x/8 can serve as the probability density function of a continuous random variable which can take on any value in the interval from 0 to 4 ?
- Write down the sample spaces for the following experiments (i)A coin is tossed and at the same time a die is rolled.(ii)The order in which a mouse,a frog,and a rabbit arrive at a lake is observed.?
- John is going to pack 2 T-shirts for basketball practice. He has 2 White shirts, 3 blue shirts, 1 green shirt, and 3 black shirts in her drawer. If John chooses the 2 shirts at random, What is the probability that he will pack 2 blue T-shirts?
- A question is given to two students A and B the probabilty of A solving the question are 6 to 9 and against B solving the question are 10 to 12. if both A and B attempt solving the question, find the probability of the question being solved?. HELP
- Probability of the impossible events equals =...........?????
- How many customers will be selected to participate in the survey on Saturday?
- A knitted hat pattern comes in 4 styles with 4 stitch options and 3 sizes, and there are 7 yarns appropriate for the hat. Disregarding size, how many different hats can be made?
- What is the probability that the next person will be assigned an aisle seat?
- Majority and his friends rolled two fair number cubes 500 times. On 42 of the trials the sun was 10. Which of these is most likely the probability that the sum of the numbers shown on the cubes is 10 when two fair number cubes are rolled?
- Data Management combinations ?
- Can someone help me solve this?
- A piggy bank contains a certain number of coins, of which 53 are dimes and 19 are nickels. The remainder of the coins in the bank are quarters. If the probability of randomly selecting a quarter is #1/4#, how many quarters does the bank contain?
- If M and N are two events such thqt P(N)=3/5, P(N|M)=2/3 and P(M'UN')=19/25. (a) Find P(M) (b)P(M|N)?
- The median of data 1,2,0,3,2,1,4 is?
- A random sample of #n=100# is drawn from a Binomial distribution, yielding an average of 0.25. What is the mean and standard deviation of #hatp#? What is the probability that #p# is between 0.18 and 0.46?
- Three of the letters of SPINS are randomly selected to form a word. How many different words are possible? These words do not have to be real words, for example, spn is one of the words.
- Find the outlier of 45,50,47,52,53,45,51?
- Choosing a purple green black or silver bike having 10 18 22 or 24 speeds? What is the sample space
- Find the number of “words” with four distinct letters that can be made from the letters "ORANGES"?
- How many 5 digits numbers can we get from numbers 1,3,5,18,70?
- A container has 14 yellow chips, 10 blue chips and 12 red chips in it one chip is randomly chosen from the container , then second chip is randomly chosen after replacing the first chip. what is the probability that both chips are red?
- What is the probability of spinning a number less than 3?
- One letter tile is randomly drawn from a set of 26 alphabet tiles representing letters A through Z. What is the probability that the letter drawn is a vowel or is in the word “now”? Give your answer as a fraction in reduced form.
- From 6 different novels and 3 different dictionaries,4 novels and 1 dictionary are to be selected and arranged in a row on a shelf so that the dictionary is always in the middle ,then find the number of such an arrangement?
- P(A)=1/4 P(B)=3/5 P(B/A)=?
- Rob noticed that 55% of the people leaving the supermarket to chose plastic bags instead of paper bags. Out of 600 people how many can Rob predict will carry plastic bags?
- A fair die is rolled n=113 times, each time observing the number of dots appearing on the topside of the die. The number of dots showing on the topside of toss i is a random variable represented by Xi. What is the mean and standard deviation of Xi?
- A 99% confidence interval for the population proportion is left parenthesis nothing comma nothing right parenthesis?
- Can you help me with this algebra 2 question?
- What is the value of a? P(X≥a)=0.5
- Can you help me with this algebra 2 question?
- A jar contains 100 marbles. There are 35 blue marbles, 34 green marbles, 28 red marbles, and 3 yellow marbles. What is the probability of randomly selecting a yellow marble?
- Is "degree" a discrete or continuous variable?
- There are 5 Red, 5 green, and 5 blue cubes in a bag. How many color combinations can be made from a single drawing of 5 random cubes?
- If a sample size is sufficiently large, should the mean and median significantly differ?
- The names Phil, Angelica, Yolanda, Mimi, and Ed are on slips of paper in a hat. A name is drawn without looking. What is the probability of not drawing Ed?
- Suppose that in a certain game, a player rolls an ordinary six-sided number cube. If the cube lands on 6, the player is paid $4. If the cube lands on any other number, the player loses $1. What is the player’s mathematical expectation?
- There are 6 girls and 7 boys in a class. A team of 10 players is to be selected from the class. If the selection is random, what is the probability of selecting a team of 5 girls and 5 boys?
- Sample Median, Stats help?
- Can someone help me answer this?
- A student must answer 3 out of 5 essay questions on a test. In how many different ways can the student select the question?
- What is a box plot for the numbers? 2,2,3,4,4,4,5,5,5,6,6,7,7,8,9
- A survey of 200 people found that 20 of them played chess . In a pie chart , what would be the sector angle of this group?
- Can someone help me solve this problem?
- How many 5 digit numbers can be made with 1,0,2,4,7 when they can be repeated?
- You roll a number cube and flip a coin. Find The probability of rolling a number less than 3 and flipping tails.write your answer is simplest form?
- A statistics professor plans classes so carefully that the lengths of her classes are uniformly distributed between 47 and 57 minutes. Find the probability that a given class period runs between 50.5 and 51 minutes?
- If you roll a die, what is the probability that a two will appear on top?
- Can someone show me how to solve this question?
- A bag of marbles has 4 green, 6 blue and 9 red. If 4 marbles are drawn out of the bag without looking, what is the probability that there will be 3 red marbles and 1 blue marble?
- Which data set COULD NOT be represented by the histogram shown?
- Three cards are randomly drawn from a standard deck of 52-playing cards without replacement. What is the probability of drawing three queens?
- The coach of a summer soccer team has observed that his team has a 55% chance of winning games played on rainy days and a 60% chance of winning games on days its not raining. The weather forecast predicts there is a 75% chance of rain (see details)?
- How many unique ways are there to arrange the letters in the word PRETTY?
- A beg contains 4 white , 5 red and 6 green ball . Three balls are drawn at random . What is the chance that a white , a red and a green ball is drawn ?
- In a class of 50 students, 18 take choir, 26 take concert band, and 2 students take both. How many students are not in either choir or concert band?
- You roll a number cube. What are the odds that you will roll an even number?
- What is area under the normal curve between #z=-2.0# and #z=-1.0#?
- Question about contingency table?
- Can someone help me solve this problem?
- A spinner has 6 sections, numbered 1-6. What is the probability of spinning less than or equal to 2 on the first spin and then spinning a 5 on the second spin?
- What is the probability of rolling a number 5 on a fair number cube ?
- The students' council in a school is made up of 9 grade 12 students and 6 grade 11 students. A committee of 5 students is being randomly selected from the council. What is the probability that the committee will have 4 grade 11's and 1 grade 12 student?
- What’s the probability of rolling a 4 or a 5 on a 6 sided number cube?
- If 1.25% of the area lies to the left of 42, and 1.25% right to the right of 48, what is the mean and standard deviation of the normal distribution?
- 20 people shake hands with each other. How many handshakes will be there in total?
- ? Find the percent of a standard normal model found in the region : #z<1.13#
- In a binomial distribution, #n=8# and #p = .3#. What is the probability #x<=2#?
- A spinner is divided into five equal sections numbered 1 through 5. Predict how many times out of 320 spins the spinner is most likely to stop on an even number?
- How to find the probability that the sample mean computed from a 25 measurements will exceed the sample mean computed from the 36 measurement by at least 3.4 but less than 5.9.?
- X is a normally distributed random variable with a mean of 22 and a standard deviation of 5. The probability that X is less than 9.7 is what?
- How to solve this problem if their are 8 random sample size, using a 95% confidece level?
- What conclusion should the firm draw from a sample that has a mean x=27.5 hours and a standard deviation s = 5 hours? (Problem is in the details)
- What is the median of 14.8, 16.1, 4.8, 12.1, and 6.9?
- Probabilities?
- A recipe has 6 ingredients, how many ways can you arrange the first 4 ingredients?
- In a series of 2n observations, half of them equal a and remaining half -a.If the standard deviation of the observations is 2,then |a| equals ?
- Can someone help me answer this question?
- Show that: #nCr = n-1Cr + n-1Cr-1# ??
- You have three $1 bills, four $5 bills, and two $10 bills in your wallet. You select a bill at random. Without replacing the bill, you choose a second bill at random. Find p ($5 then $10)?
- Find the mean average of the data set 32,18,28,24,34,32,28?
- What is the standard deviation of the data: 13, 11, 4, 5, 6, 9, 10, 12, 15, 16?
- Probabilty?
- What or how many questions I would get right if out of 42quentions I can pick 1 out of 5 answers for each question ? eg. (a,b,c,d,e)
- If you roll a regular 6-faced die 1200 times, about how many times would you expect to get a 4?
- A town's January high temperatures average 36°F with a standard deviation of 10°, while in July the mean high temperature is 74° and the standard deviation is 8°. In which month is it more unusual to have a day with a high temperature of 55°?
- There are 3 white marbles and 7 blue marbles in a bag. Jamie will randomly pick two marbles out of the bag without replacing the first marble chosen. What is the probability of Jamie picking two biue marbles?
- If 4 dice are rolled together, what is the number of ways in which at least 1 die shows 3? and If 4 dice are rolled together, what is the number of ways in which all 4 dice show 3
- How many different arrangements can be made with in the word NUMBER?
- What are the possibles values of Y? Compute the distribution of Y. What is the probability that Y is greater or equal than 3.
- The interquartile range of a data set is 10 units. What does this represent? A) There are 10 units below the lower quartile. B) The median value of the data set must be 10 units. C) There are 10 units between the upper and lower quartiles. D) The m
- The mean number of miles Mr. Austin drove in six days was 96. The mode was 82. The median was 97. What are possible distances Mr. Austin drove in the 6 days?
- Calculate the most appropriate measures of central tendency and dispersion for the given dataset? You must show your work!
- I have tried to solve number a and b, but I am confused to solve number c. Would you be so kind to help me please? It's about mathematical statistics. I am studying for my midterm. Thank you very much for your help before.
- What is the probability distribution for X?
- Sean has a box of pens. the box contains 6 blue pens, 8 black pens and 3 red pens. what is the probability that he will pick a green pen?
- A bicycle license plate requires 3 digits, each ranging from 0-9. How many different combinations are possible?
- Two cards are drawn from a well-shuffled ordinary deck of 52 cards. What is the probability that they are both aces if the first card is not replaced?
- What do you get when you divide a category's frequency by the sum of all the frequencies for the relevant variable?
- An athletic association wants to sponsor footrace.The average time to run the course is 58.6 min, with a s.deviation of 43 min.If the association give certificates to the fastest 20% of the racers, what should the cutoff time be? (normally distribution)
- There are 42 questions , there are 5 answers to each question, only 1 is correct . To pick 1 answer at random what is the chance of getting 30 questions right?
- Help me to solve about moment generating function please? I will use this for study in preparing my midterm of mathematical statistics because I am still low in this topic. Thank you very much for your help before.
- What is the median of 33,35,25,43,43?
- Probability?
- The probability for a rolling a 3 on a die and getting tails on a coin is. Based on this probability, how many possible outcomes are there? Is it likely that one would roll a 3 and get tails
- Question about Pareto diagram?
- Holly wants to choose 5 different decorative tiles out of 8. If she plans to place the 5 tiles in a row, end to end, in how many different ways can she arrange them, from left to right?
- If a team had a probability equal to .8 of winning and if they were to win 17 or more of their remaining 21 games to become champions, what is the probability that they will become champions?
- P(X≤a)=0.75 What is the value of a?
- What is the interquartile range of this data? 6 7 8 9 ? help
- Calculate the most appropriate measure of central tendency and dispersion for the given dataset? You must show your work! # # #0, 0, 3, 2, 5, 7, 1, 8, 10, 2, 2, 1, 4, 6, 0, 7, 5, 7, 7, 4#
- Am i right?
- A kid takes a test with 25 multiple choice questions and each question has four choices. If he gueses at all 25 questions, what is the probability he gets between 8 and 12 correct?
- What is P(X≥2)?
- What is the median and mean number of hours for these students? Any help would be greatly appreciated!
- You and your friend play a game in which you roll two dice. The first person to roll two dice with a sum of 5 wins. If you roll first, what is the probability that you win?
- Calculate the most appropriate measure of central tendency and dispersion for the given dataset?
- If S is a set with 10 elements and A is subset of S, what is the probability that A has 3 or more elements?
- What is P(5≤X≤8)?
- Help me about mathematical statistics please? I really need help for preparing my midterm in mathematical statistics. Thank you very much for your help.
- When taking a 7 question multiple choice test,where each question has 5 possible answers,it would be unusual to get ...........or more questions correctly by guessing alone?
- Mean=400 SD=50 For a sample of 25 people, what is the probability for 405 to 425?
- In a normal distribution with a mean of 10 pounds and a standard deviation of 5 pounds, what would the probability be that a person would gain at least 2 pounds?
- Pls help i have no room in question part. help ls?
- IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. What percentage of people have an IQ score between 103 and 136, to the nearest tenth?
- One card is selected at random from a standard deck of cards of 52. what is the probablity that the card selected is red or picture card?
- Can you calculate the probability that a randomly chosen freshman studies more than 9 hours? If not, explain why not. (Use information given below)
- How to do 191st question?
- Show that the mean median and mode are equal??
- What is the evaluation of 8p5=?
- A line of best fit predicts that when #x# equals 35, #y# will equal 34.785, but #y# actually equals 37. What is the residual in this case?
- What is the median age of the 7 whose ages are 11,10,13,11,12,16,14?
- Two dice are rolled. Find the probability that the faces are different given that the dice show sum of 10?
- How to solve this hard probability question?
- Suppose that IQ scores have a bell-shaped distribution with a mean of 104 and a standard deviation of 15. Using the empirical rule, what percentage of IQ scores are at least 59? Please do not round your answer.
- When transforming a nonstandard distribution to a standard distribution, what formula is used to convert a value into a z score?
- What is the critical value zalpha/2 that corresponds to 93% confidence level?
- A six-sided cube is rolled. What is #P(6)#?
- A red container contains 7 items of which 2 are new and 5 are old items. A purple container contains 4 items of which 1 is new and 3 are old items. An item is drawn at random from each box. 1. What is the probability that both items are old items?
- A proffesional wishes to estimate the birth weights of a baby. How large a sample must she select if she decides to be 99% confident that the true mean is within 10 ounces of the sample mean? The standard deviation of the birth weights is 4 ounces.
- A study of 36 camels showed that they could walk an average rate of 4.2 km/hr. the sample standard deviation is .64. Find the 90% confidence interval for mean of all camels?
- A sample of 50 days showed that a fast food restaurant serve an average of 182 customers during lunch (between 11am-2 pm). The standard deviation of the sample is 8. Find the 95% confidence interval for the mean?
- Find the area under the standard normal curve that lies outside the interval between z= -2.2 and z= -1.3?
- In measuring reaction time, a psychologist estimates that a standard deviation is .05 seconds. How large a sample of measurements must he take in order to be 95% confident that the error in his estimate of mean reaction time will not exceed 0.01 seconds?
- Can someone help me solve this question?
- How to solve the best point estimate for the population mean and calculate the margin of error? Wherein: A random sample of n= 75 observations from a quantitative population produced a mean of 29.7 and s= 3.286
- For a group of 10 men subjected to a stress situation, the mean number of heartbeats/min is 126 and the standard deviation was 4. Find the 95% confidence interval of the true mean?
- What is event of getting a number greater or equal to 3 when rolling a die?
- Why is there a need to keep only one variable in an experiment?
- How do you evaluate 6p4?
- Prove both the DeMorgan’s laws using truth tables?
- How many ways? can 4 person is throwing a dice. Make a sum of 6
- A bag contains 5 red, 3 brown,6 yellow, and 2 blue marbles. Once a marble is selected, it is not replaced. Find the probability of pulling a red marble, and then a blue marble?
- If the probability that it will rain today is 5/8, what is the probability that it will not?
- Assume that women's heights are normally distributed with a mean given by #mu = 62.4# in, and a standard deviation given by #sigma = 2.8# in. (a) If 1 woman is randomly selected, find the probability that her height is less than 63 in?
- Help me please?
- Help me please?
- Mrs. Chevalier’s class is reviewing by playing a math game. Mrs. Chevalier randomly selects an integer from the set of integers -15 to 15. Part A What is the probability that Mrs. Chevalier names a positive integer? Part B Explain how you determined y
- On how many ways can you arrange 6 different books on a shelf?
- A lady has 8 house in plants in how many ways can she arrange 6 of them on a line on a window sill?
- A survey of 300 fatal accidents showed that 123 were alcohol related. construct a 95% confidence interval for the proportion of fatal accidents that were alcohol related?
- A distribution has mean = 70 and SD = 20. What is the probability of getting a score value that is less than 75?
- what is the minimum sample needed if he wants to be 99% confident that the true average time is within 15 minutes of the sample average? Assume the standard deviation of all times is 30 minutes.
- On a multiple choice test with 20 questions, each question has four possible answers, one of which is correct. If 10 students sit for the test, what is the probability that one student does not get any correct answer at all?
- Two dice are thrown. Find probability of the number on the face of the second die being greater than the number of the upper face of the first die ?
- Prime numbers between 1 to 20.What is the probability of getting an odd number?.please solve for me it's urgent.
- There is a 40% chance of rain on Tuesday and a 50% chance of rain on Friday. What percent chance will it rain both Tuesday and Friday?
- 11 students in the AP Calculus class received the following scores on their term final, who ranks in the 82nd percentile for the class?
- What is the standard deviation of {7, 2600, 7, 8, 7, 7}?
- How do you Find the z-scores that separate the middle 85% of the distribution from the area in the tails of the standard normal distribution?
- An urn contains 5 red& 2 black balls. Two balls are randomly selected. Let X represents the number of black balls, what are the possible values of X?
- De Guzman Co. Claims that the average life of their battery product last of 26 hours with a standard deviation of 5 hours. What is the probability that 35 random pieces of their batteries have an average life span of less than 24.3 hours?
- When rolling two number cubes simultaneously, what is the probability of rolling a 1 on one cube and a 6 on the other?
- A bag contains 5 blue marbles, 6 red marbles, and 9 green marbles. Two marbles are drawn at random. What is the probability of first drawing a blue marble and then, without replacing it, drawing a red marble?
- Shelly recreated an experiment in which the probability of drawing a red card from a stack of red, blue, yellow, and purple cards is She draws a card, records it, replaces it, and then draws another card and continues this procedure 100 times. At the en?
- Find five numbers so that the mean, median, mode and range are all 4?
- What's the probability of randomly selecting 3 red pencils from a box containing 5 red, 3 blue, and 4 green pencils?
- The skill you can use is center, spread, and shape of distributions... Explanation?
- -express the confidence interval using the indicated format: express the confidence interval 0.047<p<0.507 in the form of p +/- E?
- Two number cubes are rolled. What is the probability that the sum of two numbers on top is 8?
- Can anyone find the missing number in the data set if the mean is 7.8? 5,8,___12,3
- We have #x_1,x_2,…,x_n# arranged in a circle, where n≥3 and every #x_i# is either 1 or -1. We can ask questions and know the products of any 3 consequent numbers, What is the minimum number of questions to know the product of the entire circle?
- In how many different orders can you line up 8 cards on a shelf?
- How many different arrangements can be made with the letters in the word ZEBRA?
- How many numbers between 2000 and 5000 can be made from the digits 1, 2, 4, 5, 7 and 8 if each digit is used only once?
- What is the probability of at least 3 girls in 7 births?
- Whats a mode in statistics?
- A bag contains 3 red marbles, 4 blue marbles and x green marbles. Given that the probability of choosing 2 green marbles is 5/26 calculate the number of marbles in the bag?
- Calculate variance: 10,8,9,7,5,12,8,6,8,2 ?
- Calculate the probability of flipping a coin 20 times and getting 4 heads. Round your answer to the nearest ten thousandth?
- A passcode contains 3 digits from 0-9. What is the probability of randomly selecting a passcode where the first digit is NOT zero and the last digit is even?
- How many ways can you choose a 8 digit passcode where all the digits are multiples of 2? (zero is NOT a multiple of 2)
- What is mean?
- A math class has 7 girls and 5 boys in the seventh grade and 5 girls and 5 boys in the eighth grade. The teacher randomly selected a seventh grader and a eighth grader what is the probability that they both were girl's?
- A boy has 20% chance of hitting at a target. Let p denote the probability of hitting the target for the first time at the nth trial. lf p satisfies the inequality 625p^2 - 175p + 12 <0 then value of n is?
- Expected Value for the Ohio Pick 4 Lottery In the Ohio Pick 4 lottery, you can bet $1 by selecting four digits, each between 0 and 9 inclusive. If the same four numbers are drawn in the same order, you win and collect $5000?
- Approximately 80% of the students who take statistics pass the class. If 12 people take the class, what is the expected value and standard deviation of the number of people who pass the class?
- How many different ways can the letters “different” be arranged?
- Question #f9e8f
- Question #656b9
- Question #db106
- Question #e97f3
- Question #0b2e4
- What is the interquartile range of the data set: 46, 9, 48, 96, 61, 84, 29, 1, 82, 5, 34?
- A correlation of 0.6 means that 60% of the points in the scatter plot lie above the regression line. Is it true or false?
- For all of the cars registered in state of colorado the correlation between their fuel efficiency (in miles per gallon) and their color would be positive. true or false?
- Question #0cdd2
- What is the mode in the data 15,22,29,34,37,38,40?
- The coach says that the probility of winning the next game is 40%. what are the odds that team will win?
- Question #65b3d
- Assuming that the heights of college women are normally distributed with mean 60 inches and standard deviation 2 inches, what percentage of women are taller than 58 inches?
- A dice is rolled, what is the probability of getting 1 and 6?
- Suppose the probability of rain tommorw is 80%. what are the odds of rain tommorrow?
- When all the numbers on a list are the same, then the standard deviation of the list is zero. #Is it true or false?
- In a class of 30 learners,17 play football,15 play volleyball,12 play rugby,9 play volleyball only and 3 play rugby only. All learners play at least one of the 3 sports. Use a Venn diagram to find the number of learners who play only volleyball and rugby?
- ? A reporter for the local news station wants to know how the citizens of the area feel about the current gas prices. The reporter decides to gather this information by conducting a survey at the local golf course. Part A Determine if the chosen sample
- Consider the word ROTOR. Whichever way you read it, from left to right or from right to left, you get the same word. Such a word is known as palindrome. Find the maximum possible number of 5-letter palindromes ?
- Find the standard deviation for the data set. 35,36,36,38,41,42,45,48?
- Four cards are drawn out from a packet of cards casually. What is the probability to find 2 cards of them to be spade? @probability
- I am trying to see if any one variable of a set of variables can better predict the Dependent Variable. I have more IVs than I do subjects so multiple regression is not working. Is there another test that I can use with small sample size?
- In a class test where the mean was 62% and the standard deviation 12.6%, bob received 50%. What is his z-score?
- Why is it necessary to have a research hypothesis in d presence of research question?
- The probability that Ashley wins a race against Madelyn is 25%. What is the probability that Ashley wins exactly the of the next five races against Madelyn?
- A carnival game wheel has 12 equal sections. One of the sections contains a star. To win a prize, players must land on the section with the star on two consecutive spins. What is the probability of a player winning?
- Michael, Becky, and Angela line up in random order for choir practice. What is the probability that Michael will be at the end of the line?
- Martin flips a coin 64 times. How many times can he expect to see rails?
- A spinner has 5 equal sections labeled 1-5. In 60 spins, how often can you expect to see a 3?
- A tennis player hits a serve that cannot be returned 45% of the time. Out of 300 serves, how many can the tennis player predict will not be returned?
- A cafeteria offers four desserts: chocolate cake, chocolate pudding, ice cream sundae, and donuts. Two desserts at random on every plate. What is the probability that any randomly-chosen plate has pudding and a donut?
- Music class of 9th and 10th. Two students will be picked same time. There are 9 males in 9th and 8 males in 10th. There are12 females in 9th and 11 girls in the 10th. What is the probability both students are male?
- A jar contains 125 marbles. Given 6% of the marbles are green, 6% of the marbles are blue, and the rest are red, how many red marbles are in the jar?
- According to the Institute of Health, 32% of women and 17% of men will suffer hip fractures due to falls. Find the probability in a random sample of 5 women, exactly 3 have suffered a broken hip from falls?
- When rolling 2 number cubes what is thee probability the sum of the two numbers will be 4?
- How to use bionominal distribution to solve extended response questions?
- What is the mode of these set 1,1,2,2,3,3 ?
- Find the z-scores for which 49.72% of the standard normal distribution's area lies between -z and z?
- Show np>npq for binominal distribution?
- A case of wine contains 12 bottles, of which two are improperly sealed and spoiled. If two bottles are randomly selected from the case, what is the probability that both are spoiled?
- A card is selected at random from well shuffled pack of 52 cards then the probability of having black coloured card is ?
- Mirna has a bag of snacks that contains 40% Takis 25% Doritos, 10% Fritos, and 25% Pretzels. If she reaches into the bag and grabs one snack, and does so 15 times, how many Takis,do you expect her to get?
- Probaility Question?
- A box contains 15 milk chocolates and 5 plain chocolates. Two chocolates are chosen at random. Calculate the probability that one of each type is picked?
- A nursery worker has 72 small trees to be displayed in lines in a rectangular shape. Each horizontal and vertical line must have more than 5 trees. How many different arrangements are possible?
- Find the geometric mean of 3 and 12?
- If the arithmetic mean of x,7,8 and 12 is 8, then find x?
- There are three numbers with arithmetic mean 3 and two numbers with sum 26. Find the arithmetic mean of these five numbers. ?
- What is a control group?
- I dont understand thiz?
- In how many ways can 4 consonants and 2 vowels be selected in the English alphabet consisting of 21 consonants and 5 vowels?
- The following distribution gives the top speeds (in kilometers per hour) at which thirty races were clocked in auto race. Top Speed 145 150 160 170 No. of racers 9 8 11 2 Find the mean and variance of the distribution of the top speeds?
- Suppose that the temperature is normally distributed with expectation 50℃ and variance 4℃.What is the probability that the temperature T will be between 48℃ and 53℃?What is the probability that T≥52℃?
- Calculate the least square regression line where annual savings is the dependent variable and annual income is the independent variable.?
- How to handle statistics questions where survey responses add up to more than the number of survey participants?
- I just learnt the whisker-plot (box-plot) and will go with the option #C# and #D#. I just want you to make me correct if I am wrong or provide the explanation if my choices are right?
- Find the value of z so that the area under the standard normal curve from 0 to z is 0.4761 and z is positive?
- Roll a fair dice four times. What is the probability that no roll is a 6?
- If #(1+x)^n# = #C_0 + C_1x + C_2x^2+cdots+C_nx^n#, then #C_1/C_0 + (2C_2)/C_1 + (3C_3)/C_2 + cdots + (nC_n)/C_(n-1) = #?
- Sir, please help me for getting the solve below question..?
- Find harmonic mean,if arithmetic mean is 20 and geometric mean 16 of two values?
- You measure 41 dogs' weights, and find they have a mean weight of 77 ounces. Assume the population standard deviation is 12.7 ounces?
- Your test scores in one class are 80 and 88. What possible scores can you earn on your next test to have a test average between 84 and 89, inclusive? Your score on the third test must be between blank and blank inclusive.
- Given that Z is a standard normal random variable, find the following. Hint draw a picture! P(Z>0.47) ?
- Brenda can choose between 2 pairs of pants and 3 shirts. How many outfits are possible?
- The probability of aren to solve a problem is 0.3 and the probability of alice to solve the same problem is 0.6 . Find the probability that the problem is solved by none of them?
- What z score represesnt 97%? interpret result
- Standard deviation of 5,10,25,30,50?
- How do find the median of this?
- Solve the following? Stacy is playing with her magical colored wands. They come in three colors: red, yellow, and blue. Every hour, the wands multiply and change color with the following probabilities: (Continued in details)
- There are 11 qualified applicants for 7 trainee positions in a fast-food management program. How many different groups of trainees can be selected?
- Three dice are tossed once what is the probability of getting a total score of 10?
- Is nominal the lowest level of measurement ?
- Factorials and Combinations is always an intimidating topic for me. Help?
- A set of cards has 5 red cards and 5 black cards. If 3 cards are selected at random, what is the probability to select at least 1 black card?
- A fair coin is tossed 4 times. What are the odds against not tossing at least one head?
- Solve the following?: Using the punnet square between two organisms with genotype Ff and Ff, the probabilities for the genotype of the offspring is like the following: FF=25%, Ff=50%, ff=25% (continued on details)
- Suppose that a person selects a card at random from a deck of 52 cards and tells us that the selected card is red.Find the probability that the card is the kind of hearts given that it is red?
- From 7 men and 4 women a committee of 6 is to be formed. In how many ways can this be done (i)when the committee contains exactly 2 women, (ii)at least 2 women?
- We have a urn with 25 balls, including 12 black balls and 13 white balls. We take 5 balls form urn with return.What is probability all 5 balls are black?
- If the mode of the following data 4,3,2,5,P,4,5,1,7,3,2,1 is 4 then the value of p is?
- The experimental probability of randomly choosing a red ball from a bag filled with red and blue is #75%.# if there are 4 blue balls in the bag, how many red balls are there?
- Let x be a binomial random variable with n=10 and p=0.2 In how many possible outcomes are there exactly 8 successes?
- The sides of a cube are numbered 11 to 16. If Renz rolled the cube once,what is the probability of rolling a composite number?
- In Bengal, 30% of the population has a certain blood type.What is the probability that exactly four out of a randomly selected group of 10 Bengalis will have that blood type?
- Find the z-score such that the area under the standard normal curve to the left Is 0.59?
- Find the probability of drawing an ace or a spade from a deck of 52 cards in a single draw?
- A pharmaceutical company claims that a new drug is successful in relieving arthritic pain in 70% of patients. Suppose that the claim is correct. The drug is given to 10 patients. What is the probability that 8 or more patients experience pain relief?
- A bookshelf contains 3 Russian novels, 4 German novels and 5 Spanish novels. All the Spanish novels must be together and no constraint on the order of the others. How many ways can you arrange these books?
- What is a median?
- In 80% of cases a worker uses the bus to go to work.If he takes the bus, there is a probability of 3/4 to arrive on time.On average, 4 days out of 6 get on time at work.Today the worker did not arrive in time to work.What's the probability he taked bus?
- Question #014fa
- If the mean time between in-flight aircraft engine shutdowns is 12500 operating hours, the 90th percentile of waiting times to the next shutdown will be?
- Median question?
- K independent file server. Each server has average "uptime" of 98%. What must k be to achieve 99.999% probability that it will be "up"?
- Standard deviation of 4,5 and 7?
- What If a set of grades on a statistics examination are approximately normally distributed with the mean of 74 and a standard deviation of 7.9? When:
- How can you prove the Poisson Distribution?
- How to do this question?
- What is the probability to have exactly 3 women? How do you do this? ( Statistics/Probability question)
- What is the probability that the next letter they draw is a letter found only in Claire's name?
- A fair five sided spinner is numbered 1,3,5,7 and 9.Katrina spins it three times.Calculate probabilty that three numbers are the same.correct answer is 1/25?i solved it by multiplying 1÷5 three times as each time it probability is 1÷5.
- A survey of few student what the drink in the morning ?
- A person has a coin, one standard deck of 52 playing cards and a six-sided number cube. How many different outcomes are possible for picking a card, flipping the coin, and rolling the number cube?
- Kevin is rolling two dice together and adding them up. Which sums should come up the most frequently?
- A playing card is chosen from a standard deck of cards (which contains a total of 52 cards) what is the probability of getting a two. a seven or an ace? a) 3/52 b) 3/13 c) 1/13 d) 1
- What is the geometric mean of 5 and 15?
- Central limit theorem?
- A pizza shop offers 19 different toppings and offers a discount if 3 toppings are chosen for a pizza. In how many different ways can 3 toppings be chosen?
- Question #6c458
- Question #88633
- A bookshelf holds #24# mysteries, #12# non-fiction books, and #4# biographies. What is the probability of selecting a mystery book and then without replacing it, selecting a non-fiction book?
- How many heads are expected in 28 tosses of a fair coin?
- S With a short time remaining in the day, a FedEx driver has time to make deliveries at 6 locations among the 9 locations remaining. How many different routes are possible?
- Question #a2230
- Two events A and B are investigated: P(A)=0.35, P(B)=0.72, the percent chance that at least one of event A or B occur is 90%; What is the probability that only one of the events happens is =?
- Question #98570
- Suppose a class of students have an average SAT math score of 720 and average verbal score of 640. The standard deviation for each part is 100. If possible, find the standard deviation of the composite score. If it is not possible, explain why.?
- How can you describe the spread of a data set?
- What's the probability of picking Alex, Joan, and Karl as the 3-member sub-committee from a committee of 15 people? How many ways can a 3-member sub-committee be picked?
- Question #95772
- A pair of fair six-sided dice is thrown eight times. Find the probability that a score greater than #7# is scored no more than five times?
- Probability question?
- Question #4ccf5
- If six fair coins are tossed,what is the probability that at least one head appears?
- The heights of the trees in a forest are normally distributed, with a mean of 25 meters and a standard deviation of 6 meters. What is the probability that a randomly selected tree in the forest has a height greater than or equal to 37 meters?
- You randomly draw a marble from a bag. You don't put it back before drawing a second marble. What kind of event is this?
- A bunch of baseball card collectors held a meeting. In total they brought 1316 cards and the average number of cards brought was 94 cards per person. How many people attended?
- What is the probability of rolling, using 2 fair number cubes, either a roll that sums to less than 10 or is a doubles?
- Question #bee7d
- A linear chain is made of 20 identical links. Each link can be made in 7 different colors. How many # physically # different chains are there?
- What is the probability of randomly drawing either the 2 of hearts or the ace of spades from a standard deck of cards?
- Question #c2317
- Question #6d862
- Question #48b8e
- Question #41354
- Question #fd994
- Question #54dde
- 3 I tiles, 2 P tiles, and 5 B tiles are in a bag. What is the probability of randomly drawing either an I or a P?
- You roll two number cubes. Find the probability of the sum of the cubes being prime? (Round to 3 decimal places)
- Question #2e46c
- You roll two number cubes. Find the probability that the sum of the cubes is 5 or less? (Round to 3 decimal places)
- What significance does variance hold?
- Question #cb1f2
- What is the probability that only one of the items is defective?
- What is the answer to this problem?
- 8 people are divided evenly into 2 groups, find the number of ways to divide them?
- Anyone knows the solution to this problem?
- Question #d86f2
- Anyone knows how to solve it?
- May selects a marble from a jar containing 6 red marbles and 2 green marbles, and does not replace it. She then selects a second marble and does not replace it. She then selects a third marble. What is the probability that all three marbles will be red?
- Question #f7c8b
- Question #d6ee0
- What is the purpose of a scatter plot?
- Question #12ac2
- Question #c064b
- Question over probability problems?
- Find every way that the team can toss the coin during the week and scrimmage first only twice?
- Question #2edbf
- Question #dda89
- How many 5-card poker hands with 2 queens and 3 aces are there?
- There are 3 blue chips, 2 red chips, and 5 white chips in a bag. It costs $6 to draw a random chip from the bag. You win $10 for a blue, $5 for a red, and $1 for a white. What's the expected winnings per draw?
- A dice is thrown 2times. What will be the probability of getting 11?
- Sarah has gone to work for 60 days. On 39 of those days, she arrive at work before 8:30 A.M. On the rest of the days she arrived after 8:30 A.M. What is the experimental probability she will arrive after 8:30 A.M. on the next day she goes to work?
- Question #bb6bc
- A flower shop has 5 yellow roses, 3 red roses and 2 white roses. Martin chooses 3 roses at random. Draw up the probability distribution table for the number of white roses Martin chooses. Can someone please solve this question?
- A student has a probability of getting failed in physics and maths by 20% and 10%.what is the probability of that student of getting failed in one subject?
- Question #be20f
- Question #f0f34
- Suppose scores in a certain school test follows a normal probability distribution, with #\mu=70# and #sigma=10#. Grade A is awarded to the highest #2.5%# students. What is the dividing point between grade A & grade B?
- What is the probability of drawing a red face card from a deck of cards?
- Question #fccd5
- For the data set shown by the table, (Take a look at the picture). Thanks?!!
- Given the table of monthly rainfall below, how do you model it with a sinusoidal function of the form #f(x) = A sin(omega x - phi) + beta# where #x# is the month number #1-12# ?
- Question #ab2ee
- Question #b8351
- There are two jars of marbles. The first jar has 4 black and 4 white marbles. The second jar has 6 black and 2 white marbles. One marble is drawn from each jar. What is the probability of drawing a black marble from both jars?
- A committee of 5 is to be selected from a group of 6 men and 9 women. If the selection is made randomly, what is the probability that the committee consists of 3 men and 2 women?
- How do you solve it?
- Use the table to calculate the probability that it is a Thursday, given that Jemma has travelled to work either by a train or a bus? The table show the relative frequencies with which Jemma uses each type of transport on her two travel day.
- Are the outcomes of a dice roll an example of a discrete or a continuous variable?
- Question #8dea3
- The correlation coefficient of a linear fit between two variables #X# and #Y# is #-1#. I want to know, does the line containing the points for the strong negative correlation always have a slope of negative one? Thanks :)
- Question #59d64
- Permutations and Combinations. What are tips and tricks for solving complicated Permutations and Combinations?
- Question #ce627
- Question #3d50f
- Question on standard deviation/variance?
- A hall has 'n' doors. Suppose that 'n' people each choose any door at random to enter the hall. a) In how many ways can this be done? b) What is the probability that at least 1 door will not be chosen by any of the people?
- Question #72098
- How to find the values of k?
- 6 keys are to be placed on a keyring. What is the number of ways of arranging the keys if there are 3 identical locker keys and 2 identical car keys?
- How do you find the mean of 39, 4, 6, 39, 14, 35, 35, 20, 6, 40, 31, 11, and 6?
- Given the central angle of the wedge on a pie graph, how do I find the percentage?
- A fair coin is tossed 10 times. What is the probability of observing exactly 8 heads?
- Question #70e01
- Find the value of x given that [x combination 4]=5[(x-2) combination 3]?
- Solving Permutations and Combinations. In how many ways can seven books be arranged on a shelf if the books are different and four particular books must be together?
- What is the value of r?
- A study of a population of 1,600 fogs revealed that 18 out of every 160 frogs in the population have sports on their back?. Based on the results of this study, how many frogs in the population do NOT have sports on their back?
- Question #2292c
- Question #47c90
- A boy and his sister are included in a group of 8 boys and 6 girls. In how many ways can a tennis four( 2 boys and 2girls) be selected so as not to include both the boy and his sister?
- Question #4879e
- Question #06ef7
- How to find the probability using discrete variables?
- Question #a9283
- Please help?
- What is the probability of rolling less than 4 on a standard cube and then getting tails on a coin flip?
- 4 shoppers are asked to state their preference for 2 brands Coke or Pepsi Let A denote the event that exactly two of the four individuals will prefer Coke. List the elements in A and find P(A)=?
- On a spinner, #P(3) = 2/5# and the #P(4) = 3/8#, what is the probability of getting 3 or 4?
- An engineering company produces turned round bars. The manufacturing tolerance is 223.92 to 224.08 mm diameter. Given that the standard deviation is 0.03 what percentage of the product would you expect to #color(brown)("not")# be within tolerance?
- Question #8e98f
- How to find the probability using discrete variables?
- How to find E(1/X)?
- How many different combinations of 5 numbers can be made from 50 (different) numbers?
- Question #e7870
- Question #4a65d
- A dice is rolled. What is the probability of P(odd)?
- If 2nP3=100×nP2 find n?(This is a question from permutation)
- Frequency question?
- There are 8 tiles in a box, each numbered with a different digit from 1 to 8. What is the probability of selecting 3 odd tiles and 1 even tile when four tiles are drawn one at a time with replacement?
- If a student takes a multiple choice test of five questions with four answers each (with one correct answer), what is the probability of guessing all five questions correctly?
- Question #b7313
- Question #e6f31
- A bag contains 10 coloured counters. 2 are picked at random. Probability of them both being red is 2/15. Use algebra to work out how many of the 10 counters in the are red?
- What are is the probability of picking a number less than 4 from a deck of cards?
- Help please?
- Question #133a2
- The mean of 8 numbers is 41 The mean of 2 of the numbers is 29 What is the mean of the other 6 numbers?
- A set o scores has a mean of 100 and a standard deviation of 20. What is the actual score if the standardized score is was 1.8?
- Help please?
- Question #957f3
- The mean of 8, 7, 5, 9, 4, 3, and #k+4# is 6. What is #k#?
- Question #060f0
- A man speaks the truth 3 out of 4 times. He rolls a dice and reports that the outcome is 6. What is the probability that the number is actually 6 ?
- Question #81855
- Question #36053
- Question #c5675
- In a school there are 8 teachers including the headmaster.In how many ways can a committee of 5 teacher can be formed without the headmaster ?
- Question #71efa
- Question #54c86
- If i choose any two number , what is the probablity that both of them would be equal?
- Question #6e77c
- Question #e0f22
- Question #5c46b
- Question #9e57d
- Question #0ef4d
- What is moment generating function?
- Ali has 6 books, while Adam has 7 books. How many possible ways can they exchange 4 books with each other?
- There are n identical cards of type A, n of type B, n of type C, and n of type D. There are 4 persons that each have to receive n cards. In how many ways can we distribute the cards ?
- Question #33988
- May I know how to solve it?? Thank you
- Question #02f65
- Question #822d0
- The average of the numbers #30, x, 4, 14, 35, x, 2, 13, 32# and #10# is #24#. What is the value of #x#?
- What's the probability of rolling a 9 or higher using two fair standard dice?
- Assume that women's heights are normally distributed with a mean given by #\mu = 64.2 in#, and a standard deviation given by #\theta = 2.2 in.# (a) If 30 woman are randomly selected, what is the probability that they have a mean height less than 65 in?
- Joint probability- mean and variance? Pl refer image attached
- How many numbers lying between 100 and 1000 can be formed, (i) if the repetition of the digits isn't allowed? (ii) if the repetition of digits is allowed?
- Find the number of words, with or without meaning, which can be made using all letters of word AGAIN. If these words are written as in a dictionary, what will be the 50th word?
- Assume that women's heights are normally distributed with a mean given by #\mu = 64.2 in#, and a standard deviation given by #\theta = 2.2 in.# (a) If 1 woman is randomly selected, what is the probability that her height is less than 65 in?
- Deck of cards combinations question?
- Quick permutations question?
- In how many ways can the letters of the word "company" be rearranged? How many of those arrangements start with the letter P?
- Question #cedf3
- What is the linear regression line for a scatterplot formed by the points (10, 261), (21, 252), (42, 209), (33, 163), and (52, 98)?
- Is this logic valid? All diamonds shine. This mineral shines. Therefore this mineral is a diamond.
- Question #653df
- You have 60 megabytes (MB) of space left on your mp3. You can choose to download song files that use 3.5 MB or video files that use 8 MB. You want to download at least 12 files. What is a graph showing the numbers of song and video files you can download?
- For what value of #lamda# the following vectors will form a basis for #E^3# #a_1 = (1,5,3) , a_2 = (4,0,lamda) , a_3 = (1,0,0) # ?
- Question #3cb26
- What is the probability of rolling a 1 or a 4 on a number cube labeled 1 through 6?
- How many even numbers less than 500 can be formed using the digits 1,2,3,4,5? Each digit can only be used once.
- Question #41d94
- Question #4c668
- Question #2bf2c
- Question #b03f9
- What is the mean and median of all the non-prime numbers between 90 and 100?
- How to find median and a mode of arranged and non-arranged data respectively?
- Two 6-sided dice are rolled. What is the probability that their results differ by 1?
- Question #9d88c
- Question #7ef75
- Question #924a2
- Question #7ec9a
- Question #f15b1
- Question #5110a
- Question #ab446
- Three numbers have a mean of 8. If we add a 4th number, the mean is now 7. What number was added?
- What is the probability distribution for the number of threes rolled when a single die is rolled five times?
- Question #6f807
- The probability that a person plays sports is 65%. the probability that a person is between the age of 12 and 18 is 40%. the probability that a person plays sports and is between the ages of 12 and 18 is 26%. are the events independent? how do you know ?
- Consider a bag with marbles, 3 blue marbles, 2 red marbles, and 5 green marbles. two marbles are drawn in sequence. what is the probability of taking a blue marble, replacing it, and then taking another blue marble ?
- If you rolled a number cube 72 times, how many times would you expect a value less than a 5?
- Question #fd510
- The commuting time for all employees of a company has a normal distribution with a mean of 44.6 minutes and a standard deviation of 11.2 minutes. What is the probability that the mean computing time by a sample of 12 employees is between 43.26 and 49.35?
- A sock drawer contains 16 yellow socks and 23 green socks. What's the probability of randomly pulling out 2 yellow socks in a row?
- Do you think that there is a high correlation between proficiency in mathematics and proficiency in chemistry? Explain why or why not.
- A correlation coefficient will always have a value between what two values?
- A researcher obtains #z = 2.04# for a one-sample #z# test. What is the decision for this test at a .05 level of significance?
- In a simple, random sample of 600 people, 418 prefer cheeseburgers. What is the 95% confidence interval?
- Question #ebae5
- Question #c3ca0
- Question #0eb8e
- Out of 786 students surveyed, 582 of them hate smoking cigaretes. Find the confidence interval corresponding to 96% degree of confidence?
- Question #72077
- Question #33aed
- Question #d03b4
- Question #a8306
- Consider the following data set [92, 103, 88, 96, 109, 77, 86, 92, 95, 90, 105), what is a sample variance?
- Oh, can I finally get some help with finding percentiles please? Thanks!
- A machine is programmed to put 737g of salts in each container that passes underneath its nozzle.In order to test Hnull:#mu#=737 vs Ha:#mu#>737, a sample of 100 boxes of salt is selected.How large must the sample mean be before the Hnull can be rejected?
- A bag has 3 blue balls and 7 green balls only. One ball is chosen at random and not replaced. A second ball is then chosen at random. Find the probability that both balls chosen are the same color?
- Question #36654
- Question #d4d25
- Question #1b5c3
- Question #a62fa
- Question #b17c3
- Five pizzas are ordered and are to be placed in a line on a table. In how many ways can the pizzas be ordered?
- A normal distribution has a mean of 51 and a standard deviation of 4. At which interval centered at the mean do 55% of values drawn from the distribution lie?
- Question #511cf
- Question #d032c
- Question #167b4
- You roll a number cube. What are the odds of rolling a 6? What are the odds of rolling a 5 or higher?
- Conditional probability using two-way tables?
- Question #41691
- Question #b3113
- How do you solve #sin(105^@)=sin(60^@+45^@)#?
- Question #67312
- You are dealt 5 cards from a standard and shuffled deck of playing cards. (52 cards) what is the probability that you’ll have at most three kings in your hand?
- Question #a7030
- A continuous random variable X has the p.d.f., f (x) = 3x^2; 0 ≤ x ≤ 1. The value of a constant λ that satisfies the relation Pr {X ≤ λ} = Pr {X > λ} is ? a) (1/3)^1/2 b) (1/2)^1/3 c) (2/3)^1/2 d) (2/3)^1/3
- Question #5ac9e
- Question #acd9e
- Question #d94af
- Numbers that are palindromes read the same forward and backward, For example, 30203 is a five-digit palindrome. If a single number is chosen randomly from the set of all two-digit numbers, what is the probability that it will be palindromic?
- The probability of A hitting a target is #2/3# and that of B is #4/5#. They both fire at the target. What is the probability that at best one of them hits the target? What is the probability that only one of them will hit the target?
- How many different strings can be made from the letters in ABRACADABRA, using all the letters?
- What is the variance of the data set 49, 2, 52, 15, 25, 9, 3, 5 to the nearest hundredth?
- Question #fdbea
- Question #c22ec
- Question #d401c
- Question #e13c9
- Question #c63d8
- Question #f97a6
- How to do this regression question?
- Question #2846c
- What is the difference between VAR.S function and VAR.P function on Microsoft Excel?
- Question #111bd
- Question #37588
- A professor finds that the scores on a History exam are known to be normally distributed with mean and standard deviation of 55 and 15, respectively. What is the passing score if 95% of the students are to clear the course?
- Question #36b06
- Question #2a444
- A team has 13 players, 5 of whom are on the field at any one time. How many different 5-player groups can be made?
- The medical records for a class of 28 children show whether they had previously had measles or mumps. The records show 22 have had measles, 13 have had measles and mumps, and 27 have had measles or mumps. How many children had mumps?
- Am I doing this regression problem wrongly?? Please help! Thank you!
- How to calculate the probability of a Type II error?
- Six sided die is rolled six times. What is the or probability that the die will show an even number exactly 2 times?
- In the box are 30 lottery tickets. 5 of them are happy. 7 tickets are being fetched. In how many cases, there will be 2 happy tickets?
- Question #50816
- Question #b180d
- Question #85ee9
- Question #7c0ea
- How to solve extended response question using probability?
- Question #4a54c
- How many different committees can be formed from 11 teachers and 38 students if the committee consists of 4 teachers and 4 students?
- Question #c4953
- The probability density function of x is given as f(x) = ae^-x/5 for x > 0. The value of a is ? (a) 0·5 (b) 0·3 (c) 0·2 (d) 0·1
- At a fitness center, 64.1% take at least 1 class, 18.6% work with a trainer, 9.2% do both. If a member of the center is selected at random, what's the probability that she does neither?
- Is this asking for the confidence interval? If so, how to calculate?
- Question #8717a
- What's the mode of these values: 1, 2, 3, 3, 4, 4, 5?
- Question #54f58
- Question #db050
- Question #3ac61
- How to find calculate this?
- The mode of five numbers is 1,the median is 4 and the mean is.What are the numbers?
- Question #f29b0
- How do you find the mean, median, mode, and range of this data: 49, 49, 54, 55, 52, 49, 55?
- Question #2d36c
- H0: μ = 100 H1: μ ≠ 100 σ = 10,𝑛 = 100,𝑥̅ = 100,𝛼 = 0.05 Calculate the value of the test statistic, set up the rejection region, determine the p-value, interpret the result, and draw the sampling distribution. How?
- Question #24f9a
- Question #f2e74
- How to apply binomial distributions on extended despise questions?
- How to find the p-value?
- What is the median of the following numbers: 15, 8, 3, 5, 6, 11?
- Question #2b1be
- Question #7a169
- Question #6cff0
- Question #301ed
- Question #fdff2
- Question #36532
- Question #426b8
- Question #05768
- How to do this hypothesis testing question?
- What is the probability that exactly one of them is female and exactly one is a child?
- Find #k# such that #"P"(-k<Z<k)=0.95#?
- The mode of five numbers is 1,the median is 4 and the mean is 5.what are the numbers?
- How to do this hypothesis testing question?
- Question #dd2ca
- The average of three numbers is #5#. If the sum of two of the numbers is #6#, what is the third number?
- Question #71f41
- Question #51dfa
- Debbie randomly selects a card from a standard deck. What is the probability that either a heart or a Queen is selected?
- Question is about z-scores....?
- Question #fc919
- How to do on excel ￼1)Confidence Interval (both t-test and z-test and compare the results) ? 2) Establish a 95% and 90% confidence interval for the average heights for the female and male.
- Question #f69b7
- Suppose that four 9-sided dice are tossed. What is the probability that the sum on the four dice is greater than or equal to 6?
- Question #9a95e
- Question #75a63
- Question #ac7d4
- How do I find #z# for a given confidence level #alpha#?
- Question #6828f
- Sarah has two skirts and three tops in her suitcase. One of the skirts is blue; the other is red. The tops are red, blue and white. She randomly removes one skirt and one top from the suitcase. What are all the possible combinations?
- Question #19e90
- Question #31a86
- Michael has 4 biased coins where each of them comes up head with probability 0.6. Michael plays a game with his 3 friends. Each of them tosses the 4 coins for 5 times. The winner would be the one who gets 3 times at least 3 heads of tosses. ?
- In what kind of situation can a binomial distribution be used to solve for probability?
- Question #230f1
- Question #b0568
- Question #5e82f
- The weekly incomes of a large group of executives are normally distributed with a mean of $2,000 and a standard deviation of $100. What is the z-score for an income of $2,200?
- If you roll five dice, what are the odds of rolling five 5's?
- Question #57c64
- Question #8d6b7
- When flipping a coin four times, what is the probability of getting four heads in a row?
- What does it mean for a property to be quantized?
- In how many ways can 3 things be chosen from a group of 10 (where order doesn't matter)?
- Question #f19b2
- Question #9742e
- The question in the picture below..?
- Question #6bcb7
- How does this question leads to a Bias and please state the direction of the bias?
- Seven athletes participate in a 100-meter sprint event. How many possible finishes are there for the first 3 positions?
- How to establish a 95% and 97.5% confidence interval for the average heights of the female and male students? How to do the same for the students population regardless of the Gender. How to compare?
- The harmonic mean of two numbers is 3.2 and the geometric mean is 4. What are the two numbers and what is their arithmetic mean?
- Help me answer this question.....? (question in picture below)
- Question #2af0c
- How does an outlier affect the mean of a population?
- What is the probability of #X=7# successes, using the binomial formula?
- Please answer?
- Question #fb52f
- Question #279ca
- Question #675ec
- Question #5eb8c
- Question #c56c8
- Question #05d65
- A batch of 200 phones contains 195 good phones and 5 defective ones. If 2 phones are selected at random, what is the probability of selecting 1 working phone and 1 defective phone?
- Construct a dataset of 7 elements whose median is 87?
- How do I use the method of moments to find the estimate of #theta# in the pdf #f(x) = {[theta e^(–thetax)",", x >= 0],[0",","otherwise"]:}#?
- Question #3cbef
- Question #d1070
- Question #c9523
- The probability of rain on any particular day is 0.2. However, the probability of rain on a day after a rainy day is 0.85, whereas the probability of rain on a day after a non-rainy day is 0.1 . Question in details (below)?
- Question #00fa5
- 2 companies, A and B, drill wells in a rural area. Company A charges a flat fee of RM3500 to drill a well regardless of its depth. Company B charges RM1000 plus RM12 per foot to drill a well. ?
- One card is selected at random from a deck of cards. What is the probability that the card selected is a spade or a queen?
- Question #0e34b
- How many positive numbers can be made from the digits 1, 2, 3, 4, 5, 6, 7, 8 and 9 so that they are smaller than 800? The digits can repeat.
- If we rearrange the letters in the word Triangle, and we keep the vowels in odd places (and so, for example, A can be the first letter but not the second), in how many different ways can we arrange them?
- The probability of a particular event is 6/8. What is the probability that the event will not happen? Explain.
- Question #52177
- Two cards are randomly drawn from a standard of 52-playing cards without replacement. What is the probability of drawing a 2 followed by a 5?
- What is the range of the following numbers: 345,893,21,984,23,99 and 246?
- A fair 6-sided die is rolled three times. Find the probability that the sum of the three dice is 4 ?
- Question #786ba
- What is the probability of tossing a head on a coin if a 3 is tossed on a die?
- Question #2050e
- Question #01cbb
- What is #"P"(Z<1.37)#, and what does the "P" mean? I'm new to Statistics and don't understand much about it.
- A computer takes tokens for 10 minutes and for 30 minutes, 30% of the tokens used are for ten minutes. The tokens cost £1 for 10 minutes and £2 for 30 minutes. What is the mean for the amount of time per token?
- Question #f982f
- Question #b2b5f
- Question #c8a07
- Trent told his friends it would take him 90 minutes to mow the lawn. It only took him 75 minutes. What is his percent error?
- A bag contains 36 numbered tiles. In how many ways can 3 tiles be drawn if A. there is no replacement, and B. there is replacement?
- Question #52237
- Question #cd678
- A fish tank has a certain number of males and a higher number of females. An equal number of male and female fish are then added to the tank. Does the probability of randomly picking a male fish a. go up, b. go down, c. stay the same, d. we can't tell?
- How to answer these questions ?
- How many ways can 4 students be arranged in a row?
- In a game of chance, six cards numbered 1 to 6 are lying face down on a table. To cards are selected without replacement and the sum of both numbers is noted. Find the probability that the total sum is at least 10?
- A storm measuring #25m xx 7m# is over a reservoir measuring #3m xx 2m#. The storm produces 12 lightning strikes per minute. What is the probability of the reservoir not being struck in one minute? I get 0.6579 but the textbook answer is 0.5926.
- What is the probability that out of 52 cards that the card you pick would be a five?
- Question #748b2
- A team is being formed. There are 6 boys and we need 5 on the team. There are 8 girls and we need 6 on the team. How many different combinations of teams are possible?
- Using the digits 1 through 8, how many unique 2-digit numbers can be made?
- Does the calculation of average work for negative numbers?
- Imagine that you write each letter of the word # IMAGINE# on individual cards. You shuffle them, turn them face down on a table, and turn over the top card. What is the probability of turning over an #A#?
- Question #d8bb3
- Question #dacc9
- Question #b9013
- Question #903d7
- Question #2ce41
- In how many different unique ways can the letters of the word Statistically be arranged?
- Question #15a8c
- A process for making plate glass produces small bubbles (imperfections) scattered at random in the glass, at an average rate of 4 small bubbles per #10m^2#. Consider glass pieces with dimensions 2.5m x 2.0m.?
- Two boys and three girls will be standing in line. 1. How many ways can they line up? 2. How many ways can they line up if the boys are on the ends? 3. How many ways can they line up if the boys need to be together?
- Ten couples are waiting in line at a buffet table. How many different ways can they stand in line if each couple needs to stay together?
- If a dataset has a single outlier, which of these measures of spread will be affected if the outlier changes?
- The probability distribution function of a discrete variable X is given by: P(X=r) = kr, r=1,2,3,...,n, where k is a constant. Show that #k=2/(n(n+1))# ?
- After rolling four dice, what is the probability that all four dice show different numbers?
- A coin is tossed 12 times. What is the probability of getting exactly 6 tails?
- Question #c653f
- Probability question?
- Pairs of random numbers (x,y) are generated where the variables X and Y are integers between 0 to 5 inclusive. (i) How many different pairs are possible?
- Tickets numbered 1 through 20 are in a bag. What's the probability of picking a number that is a multiple of either 3 or 5?
- Two friends have identical libraries of 40 books each. They each pick their 8 favourite books, some titles being in both friend's picks. My friend says if you divide 40 choose 8 by #2!#, it'll eliminate the duplicates and you'll get an accurate answer?
- Question #08827
- Question #3a2dc
- Question #26d88
- Question #2c069
- Question #39e58
- Four identical apples and four identical pears are arranged in a line. How many ways can this be done?
- Given there are 6 boys and 2 girls arranged in a row, what is the probability there are at least 3 boys separating the 2 girls?
- From a pack of 9 cards numbered 1,2,3.......9 , three cards are drawn at random and laid on a table from left to right. What is the probability that the digits are drawn in descending order (by just using permutation)?
- Question #12d3c
- Are age-structure diagrams useful in predicting future population trends?
- A card is selected from a standard deck of 52 playing cards.Find the probability that the card is a diamond or not a king?
- Given the following survey results, how many people like C only?
- A group consists of four juniors and five seniors. Four students are chosen to participate in a local scavenger hunt. What's the probability that the selected group will consist of all seniors?
- We wish to select 6 persons from 8, but if the person A is chosen ,then B mist be chosen.In how many ways can the selection be made?
- The average weight of 6 students is 62 kg. If a 7th student weighs 52 kg, what is the new average weight of all 7 students?
- The lowest test score is 10, and the highest is 100. The 25th percentile is 30, the median is 48, and the 75th percentile is 70; no student scored exactly 30, 48, or 70. If 120 students scored less than 70, then how many scored above 48?
- There are six friends in a book club and each of them gives their book to one friend and receives a book from another friend. How many different ways can the books be exchanged, assuming that no two friends can exchange (give and receive) books?
- A teacher has 12 exams to grade: 8 today and 4 tomorrow. The teacher makes a stack of exams to grade today. How many different combinations of exams to be graded today can be made?
- A child has three plastic toys bearing the digits 3,3,5 respectively.How many 3-digit numbers can he make using them? Please solve this question without using the formula of permutations of objects not all different which is given by n!/P!×q!.
- If the mean, actual observed values, and standard deviation are multiplied by #2#, does the z-score stay the same?
- Question #e0425
- Two dice are thrown. Event #A# is "the sum of two dice is #7#" and Event #B# is "at least one die is #6#". Are #A# and #B# independent?
- Question #ff951
- A lottery claims that 10% of tickets win a prize. How many tickets should you purchase to be more than 50% sure of winning a prize?
- Question #0c571
- If there are 6 periods on each working day of a school,in how many ways can one arrange 5 subjects such that each subject is allowed at least one period?
- Question #b3e63
- Question #53192
- Question #26143
- There are three questions, and three choices of answer (A, B and C) for each question. If only one of the possible choices (A, B or C) is correct for each question, what is the probability of getting one answer correct?
- Question #680f3
- If the mean of 3, 3, 7, 8, 10, #x#, and #x# is 7, what is #x#?
- Question #b5806
- At the Avonlea Country Club, 68% of the members play bridge and swim, and 85% play bridge. If a member is selected at random, what is probability that the member swims and plays bridge?
- On the roll of a pair of dice, what's the probability of rolling a 7 or 11?
- The mean of a set of data is 4.11 and its standard deviation is 3.03. What is the z-score for a value of 10.86?
- For these numbers: #2,2,0,5,1,4,1,3,0,0,1,4,4,0,1,4,3,4,2#, what is the (a) mean, (b) median, (c) variance and (d) standard deviation?
- Question #3c669
- Question #a2ec7
- Question #8d43d
- Question #1720b
- 30% of the 20 people in the Math Club have blonde hair. If 3 people are selected at random from the club, what is the probability that none have blonde hair?
- Question #1cd46
- Question #355ed
- Question #50172
- Question #56685
- Question #f4b1c
- Which of these correlation numbers shows the strongest relationship?
- The number of way in which a examiner can assign 30 marks to 8 questions given not less than 2 marks to any question is?
- Can I get some help please? thanks!
- Question #93fea
- If mean IQ is #105# and standard deviation is #20#, what is the probability that a randomly selected adult has an IQ between #85# and #125#?
- There are 6 red, 4 green, and 8 white marbles in a bag. What's the probability of drawing with replacement first a red marble and then a green marble?
- Question #3fe50
- Question #bd86d
- In how many ways can 2 men and 3 women sit on a straight line if the men must sit on the ends ?
- People with z-scores above 2.5 on an IQ test are sometimes classified as geniuses. If IQ scores have a mean of 100 and a standard deviation of 16 points, what IQ score do you need to be considered a genius?
- The values 104, 137, 154, 131, and a 5th number have a mean of 130. What's the missing number?
- Question #a38c7
- If two dice are rolled one time, what is the probability of getting a sum of 9?
- Suppose you choose a marble from a bag containing 3 red marbles, 5 white marbles, and 4 blue marbles. You return the first marble to the bag and then choose again. What is the probability that you will pick a red marble and then a blue marble?
- Question #bff89
- Are these statements true or false about the performing of a drug trial?
- Question #5910b
- The number of permutations of 1,2,3,4,5,6 such that pattern 12,23,34,45,56 do not appear in the permutation is ?
- Question #8a9b1
- In how many ways can 10 people stand in a line?
- There are some number of math books, #m# on a shelf and sitting next to them are some number of natural science books, #n#. #m>n# and we know there are less than 10 of each. There are 1,209,600 ways to order the books. #m=?#
- #P=(C_2^1*C_4^2*C_6^3*...*C_2014^1007)/(C_1^1*C_3^2*C_5^3*...*C_2013^1007)# What is the value of P?
- How many ways can someone pick (from the English language) a vowel, a consonant, and a single digit?
- Question #0de68
- Question #8d735
- Question #e5eee
- Question #9ce3f
- How many arrangements can be made with the letters of the word 'MATHEMATIC'? In how many of them will vowels be together?
- Question #d6ec5
- Question #be751
- Question #188a9
- Question #da231
- What is one way the internet can help me study statistics?
- Question #411d8
- How many different ways can you arrange strike?
- Human proofreaders catch 70% of word errors. If a single essay contains 10 word errors, what is the distribution of the number of errors caught in this essay?
- What is the mode of #{41, 43, 47, 44, 44, 45, 43, 39}#?
- Question #5e40c
- What is the difference between discrete data and continuous data? Do data ranking a TV show on a scale from 1 to 4 count as discrete or continuous?
- How many permutations are there for the letters in the word #" machines"?#
- Question #bb6b4
- How do you find the mean of #{25,31,31,20,30,26,32,31,35}#?
- In how many ways can 6 people be seated around a table?
- Question #f86db
- How do you find the mean of the data set: 8, 10, 46, 37, 20, 8, 11?
- Question #16ce0
- In how many ways can a 5-card poker hand be void (i.e. have no cards in) at least 1 suit?
- In a list of 4 numbers, we know the mean is 54, the mean of the middle two values is 56, and the mode is 60. What is the mean of the smallest and largest numbers?
- Question #bde8e
- Use the given information to find the minimum sample size required to estimate an unknown population mean #\mu#?
- 15 names are in a hat, 6 girls and 9 boys. What is the probability of drawing, without replacement, two girls names in a row?
- Question #1eebc
- Question #a9f17
- What is #"P"(Z< –2.31) + "P"(Z> 2.31)#?
- Question #9ec4b
- Question #a83d6
- Question #1653b
- If two dice rolled and the values are added, how do you arrange the following probabilities in ascending order? The sum is odd, the sum is not #7#, the sum is exactly #12#, the sum is less than #5#.
- If the ratio of girls to boys is 3:2, what is the ratio of boys to total students?
- Question #03064
- Leanna guesses on four multiple choice test questions in a row. If each question has 3 possible answers, what is the probability that Leanna will guess the answer to the 4th question correctly?
- If #X# is normally distributed, how do I find #"P"(X<5.83)#?
- A quiz has 1 true-false question and 2 multiple choice questions that each have 4 answers. What is the probability that someone guessing all 3 answers will get 100% on the quiz?
- What is the standard deviation of the data set #11, 5, 12, 8, 5, 12, 10# rounded to the nearest tenth?
- Based on recent results, scores on the SAT test are normally distributed with a mean of 1652 and a standard deviation of 212. What is the probability that a randomly selected student has a SAT score greater than 1750?
- If A is thrice as fast as B and B takes #60# days more to finish a work, than how much time they will take to finish the work together?
- Question #15f2d
- Question #da21a
- Question #9493a
- The average (arithmetic mean) weight of 3 boxes is 70 pounds. If each box weighs at least 68 pounds, what is the greatest possible weight, in pounds, of one of these boxes?
- Explain using the concept of a confidence interval (population proportion)?
- Question #137b9
- Question #8c8aa
- Question #ccad2
- Mean/median/mode and range/standard deviation/variance (sample)?
- Question #c67a2
- How many 4-digit numbers can be made that are divisible by 4 if we have the digits 2, 4, 5, 6, 7 and for each number we can only use each digit once?
- Question #9a474
- Question #4b2e4
- A history lecture hall class has 15 students. There is a 15% absentee rate per class meeting. What is the probability that exactly one student will be absent from class?
- In how many ways can the letters of the word "PERMUTATIONS" be arranged so that there are always 4 letters between 'P' and 'S'?
- Question #83568
- What measure of central tendency is not influenced by outliers?
- How many ways can a committee of 4 people be selected from a group of 7 people?
- Question #0325b
- "The graph of a normal curve is given. Use the graph to identify the values of #\mu# and #\sigma#" ?
- Question #fef61
- How many people, #n#, are we picking from to form a committee of 4 people if we know that included in #n# are two women, and that it's twice as likely for the two women to be on the committee than it is for no women to be on the committee?
- Question #cdc8b
- Question #57fa4
- Question #1b7a8
- A sample of 4 different calculators is randomly selected from a group containing 16 that are defective and 30 that have no defects; what is the probability that at least one of the calculators is defective?
- Square root of 15 is the geometric mean of x and y . find y if x=3?
- Question #9b7fc
- Question #c82e6
- What is the probability of rolling a sum of 10 with two dice?
- How many different 9-0 letter code words can be made using the symbols %, %, %, %, &, &, &, +, +?
- For a Gallup poll, #M# is the event of randomly selecting a male, and #R# is the event of randomly selecting a Republican. Are events #M# and #R# disjoint? Why or why not?
- You take a deck of cards and pick a card at random, face down. You then predict what the card is. What is the probability of guessing a. the card's suit, b. the ordinal (ace, two, king, etc), and c. the actual card?
- Why are lower and upper fences important?
- In a bridge game of playing cards,4 players are distributed one card each by turn so that each player gets 13 cards. Find possible number ways?
- Question #cf374
- Question #1fc8b
- The cooler at a picnic contained 4 apple juice boxes, 8 orange juice boxes, and 6 fruit punch juice boxes. A juice box is selected at random. What is the probability of the complement of choosing an orange juice box?
- Question #f3b4f
- Question #2f498
- The lengths of a particular snake are approximately normally distributed with a given mean = 15 in. and a standard deviation of 0.8 in. What percentage of the snakes are longer than 16.6 in?
- Question #70d19
- A total of 6 family members will appear in a portrait. If 2 of the family members may sit in the front row, how many combinations of family members may sit in the front row?
- Emily is playing a board game that has a spinner divided into equal sections numbered 1 to 18. The probability of the spinner landing on an even number or a multiple of 3 ?
- Question #d4389
- Question #5b3c2
- What's the probability of drawing 7 preselected balls from a bowl of 35?
- What would be a good estimation of the correlation coefficient for the data displayed in the scatterplot?
- If mean profits of an SME (small or medium enterprise) is #£46,000# and standard deviation is #£19,000#, what is the probability that a specific SME has profit between #£44,000# and #£48,000#?
- Question #0cfe2
- Question #6563e
- Question #f1189
- Question #7f63d
- The mean pregnancy lasts for #200# days with a standard deviation of #19# days. If the distribution is normal, what is the probability that a randomly selected pregnancy is less than #194# days?
- Question #4df02
- Question #a91f7
- Question #76d0a
- Question #072bd
- Question #fec7b
- What's the string of 4 numbers that results in a median of 20?
- On a roll of dice, what is the probability of rolling either a multiple of 4 or a multiple of 6?
- In how many ways can we pick 1 woman and 2 men from groups of a: 8 men and 7 women, b. 3 men and 3 women?
- Roy is picking his 3 classes for the upcoming term. There are two groups the classes are divided into and he needs to pick at least one from each group (Group 1 has 5 choices and Group 2 has 4 choices). How many ways can Roy pick his classes?
- You are taking a multiple choice test. Each question has 4 possible answers, 1 of which is correct. You were able to study 70% of the material and will get each of those questions right. Find the following?
- Question #5cc63
- The average of #a# and #b# is 6 and the average of #a,b,# and #c# is 11. What is the value of #c#?
- Question #58874
- Question #d4b35
- Question #e236e
- 4 distinguishable chess pieces are to be placed on a chessboard such that no piece lies on a vertical or horizontal line with any other piece. In how many ways can the 4 pieces be placed?
- Question #32f49
- In a recent survey of students who graduated from a large public high school, nine out of ten students reported that they passed biology with a grade of 75% or higher. What further data could be produced to be sure that this information is accurate?
- Question #25e36
- There are three rooms for #10# students, one with #3# beds, one with #2# beds and one with #5# beds. in how many ways can the #10# students be assigned to the three rooms so that each has a bed?
- Question #9e796
- Question #f40f6
- In how many ways can a poker hand have a suit missing (so no Spades, for instance)?
- Question #fd3c6
- Question #3ffdf
- A carnival wheel has a fixed pointer pointing to one of 8 sections of the wheel. If the sections of the wheel contain numbers from 1 to 8 , what is the probability that the pointer will point to a number less than 4 after the wheel is spun?
- Sue's average for 9 games of bowling is 108. What is the lowest score she can receive for the tenth game to have a mean of 110?
- Question #31e7a
- On any given multiple choice question, there are 7 answers with 1 being correct. What's the probability of guessing the right one?
- Question #d2da3
- How many ways are there of seating #10# couples around a round table such that each couple is sat together?
- What's the probability of being dealt a full house in 5-card poker?
- Question #b7e0f
- The weight of football players is normally distributed with a mean of 200 pounds and a standard deviation of 25 pounds. The probability of a player weighing more than 241.25 pounds is?
- Brian rolls a number cube twice. What is the probability that the sum of the 2 rolls is less than 6, given that the first roll is a 3?
- Question #ae78c
- What is the IQR (Inter Quartile Range) for the data set? 11 6 19 14 21 7 13 15 15
- Five books of different heights are arranged in a row. Find the probability that (a) the tallest book is at the right end. (b) the tallest and shortest books occupy the end position (c) the tallest and shortest books are together ?
- Question #9ddff
- Question #0ebed
- Question #0251e
- In a binomial distribution, #n=8# and #p = .3#. What is the probability #x=2#?
- Question #fd17e
- A world-class sprinter is the coach of a high school track team.There are 52 members of the track team.The coach times everyone on the team, including himself, running the 100-meter race.Which measure will be the most greatly affected by the inclusion...?
- Question #48af4
- Question #24dc0
- How many different 4-letter "words" can be formed from the letters in the word DUPLICATE?
- Question #e22e7
- What is the mean, median, mode, and range of 7, 3, 3, 9, 9, 5, 9, 3, 6?
- To win the lottery one must correctly select 5 numbers from 50 numbers. The order in which the selection is made does not matter. How many different selections are possible? what is the probability of winning?
- Question #1cdc2
- Question #95698
- Question #473eb
- Question #6471f
- Nicole's basket team score 40 point, 20 points, 30 points, 10 points and 10 points in their last 5 games. What is the mean of their scores over the last 5 games?
- Question #7e646
- Question #bf95f
- Question #7d0f8
- Question #9e8d6
- Question #aa041
- Help w/ Another Tree Diagram Question?
- Help with this Tree Diagram Question?
- What is the probability that a number picked from the set {-4, -3, -2, -1, 0, 1, 2, 3, 4, 5} will be a solution of 2x+5>1?
- Question #0f5f1
- Question #773b6
- Question #15462
- Question #df603
- Question #b1bea
- Question #41b4a
- How do you calculate the number in the middle of 11 and 24?
- Question #b39a4
- Question #b4da1
- A carnival game has a player toss a coin with radius 1cm onto a square table with sides of 17cm. On the table are 9 grey squares, 3cm to a side. To win, a coin must sit entirely within a grey square. The probability of a randomly thrown coin winning is?
- Question #e9098
- Question #3c68b
- Suppose X is a uniform discrete random variable with possible values #X=1,2,....,n.# Can you show that the variance of #X# is #(n^2-1)/12#? Hint: #1^2 + 2^2 + 3^2+ .... + n^2=(n(n+1)(2n+1))/6#
- Question #c5690
- A teacher is setting up a schedule to meet with 3 children and their moms one at a time. A child will meet with the teacher before meeting with his/her parent. How many ways can the schedule be arranged?
- There are 8 books to be arranged on a shelf. The three novels must be kept together, as do the two math books. The other two books are biology but need not be kept together. How many ways can they be arranged?
- What is the mode in the set {35,33,34}?
- Question #1efa6
- There is a class or 20 pupils. The teacher decides to select any 6 pupils form them do attempt the hardest project on his list. How many different combinations of pupils may he choose?
- Can you use #sigma^2=Sigma(x_i-mu)^2p_i# to show that #sigma^2=Sigmax_i^2p_i-mu^2#?
- Look at table below. What is the probability of choosing a person in California given that they are a male?
- Question #a5fe0
- Question #d1216
- Question #2cf30
- Question #ab149
- Question #86ec7
- There are 10 numbers, numbered A1 through A10. How many different ways can we arrange them if we need at least A1 and A2 in between A3 and A4?
- A three-digit number is multiplied by a two-digit number whose tens’ digit is 9. The product is a four-digit number whose hundreds digit is 2. How many three-digit numbers satisfy this condition?
- Question #fa68c
- Question #4fda3
- Question #ed330
- Question #b8976
- How do you find the range of the data set: 5, 3, 8, 4, 9, 7, 5, 6, 2, 3, 6, 8, 4?
- What's the probability of rolling less than or equal to 7 on two fair regular number cubes?
- In a box of 24 iPods, 3 are defective. If 3 are sold, find the probability that all are defective. Would you consider this event likely or unlikely to occur?
- Question #7f13f
- There are: 128,665 twins, 7110 triplets, 468 quadruplets, and 85 quintuplets. A)Find the probability that it represented more than two babies.B) Find the probability it represented quads or quints. C)choose one baby, whats the prob baby was a triplet?
- A) Look at table below. Find the probability the student is a female ages 25-34. B) Find the probability student is under 25 and not a male?
- Look at table below. Find these probabilites. A.) Exactly 1 item B.) More than 2 items C.) At least 1 item D.) At most 3 items?
- If a patient is selected at random, find these probabilities. A)Patient has had exactly 2 tests done. B) Patient has had at least 2 tests done.C) Patient has had at most 3 tests.D)Patient has had 3 or fewer tests done. E)Patient has had 3 or fewertests?
- In how many ways can the acronym NOUN be written?
- We have a fair die inscribed with the letters A through F. What's the probability of rolling the die three times and getting the first 3 letters of the alphabet? What's the probability of rolling one of the first three letters in 1 roll?
- Summing the rolls of 2 fair dice, what's the probability of rolling a prime number (so rolling a 3 and a 3 doesn't work because 6 is composite)?
- If the radius of the shaded center circle is 1 and the radius of the entire dartboard is 4, what is the probability of throwing a dart and hitting the white part of the board?
- A family has 3 children. Find the probabilities. A) all boys B) All boys or all girls C) Exactly two boys or two girls D) At least one child of each gender What are the probabilities?
- In a game of craps, a player loses on the roll if a 2, 3, or 12 is tossed on the first roll. What is the probability of losing on the first roll?
- How do you find the range for 36, 17, 22, 43, 11, 56, 17, 71?
- Question #01f59
- Question #e4ec5
- A consumer organization estimates that over a 1-year period 20% of cars will need to be repaired once, 6% will need repairs twice, and 2% will require three or more repairs. What is the probability that a car chosen at random will need repairs?
- Suppose Q and R are independent events. Find P(Q and R) if P(Q) = 0.41 and P(R) = 0.44?
- In how many different ways can 5 books be arranged on a shelf?
- Set A has elements 1, 2. Set B has elements a, b, c, d. We're interested in making subsets from the product of A x B that have at least 3 elements. How many subsets can be made?
- What is the median of 0, 15, 16, 17, 21, 72, 51, 78, -3, 13, 100, 19?
- What is the probability of rolling a total of 9 with two fair dice?
- A bag contains 7 red marbles, 12 orange marbles, 18 yellow marbles, and 5 purple marbles. A marble is drawn at random from the bag. What is the probability that the marble drawn will not be orange?
- The door code to get into a top-secret laboratory is 6 digits. The first 3 digits of the code are all odd and the last 3 digits are all even. Digits can be used more than once. How many possible codes are there to gain access to this laboratory?
- Question #684a6
- Luke records the number of birds that visit his bird table. The numbers recorded last week were 8, 12, 14, 9, 8, 10, and 13. What are the mean and standard deviation for this data?
- What is the mean, median, mode, and range of 5, 30, 35, 20, 5, 25, 20?
- If a fair number cubed is rolled 18 times, how many times is the number 2 expected to come up?
- How many different ways can a researcher select 5 rats from 20 rats and assign each to a different test?
- Asurvey of 250 people eating out found that 112 plan to see a movie after their meal. What is the probability a person eating out will see a movie after their meal?
- What is the average of 39 and 146?
- What is the median number for the numbers 4, 8, 10, 5, 9?
- What is the probability of rolling a sum of 11 with two dice?
- A math class has 7 girls and 5 boys in the seventh grade and 4 girls and 4 boys in the eighth grade. The teacher randomly selects a seventh grader and an eighth grader from the class for a competition. What is the probability that she selects two boys?
- How are repeated trials different from replication?
- How do you use the Counting Principle to find the probability of choosing the 5 winning lottery numbers when the numbers are chosen at random from 0 to 9?
- What is the probability of rolling a sum of 9 with two dice?
- Given the data points (12, -5), (0, 3), (9, -2), (6, 0), and (1, 1), how would you describe the correlation of the data?
- What is the probability of #X= 6# successes, using the binomial formula?
- How do you use the Counting Principle to find the probability of rolling a 4 on each of 4 number cubes?
- A jar contains 100 marbles. There are 49 blue marbles, 7 green marbles, 27 red marbles, and 17 yellow marbles. What is the probability of randomly selecting a red marble?
- In how many ways can 4 students from a group of 9 be seated in a row of 4 chairs?
- Sixty-four percent of all airplanes arriving at an airport are late. Using the binomial formula, what is the probability that in a random sample of seven airplanes, exactly four will arrive late?
- A burger joint offers burgers with 1, 2, and 3 patty options, with and without cheese. What percentage of the orders are 2 patties, no cheese?
- There are 5 cyclists in a race. If the first-place finisher receives a gold medal, the second-place finisher receives a silver medal, and the third-place finisher receives a bronze medal, how many different permutations are possible for the medal winners?
- One ball is drawn at random from a bag containing 5 red balls and 6 white balls. What is the probability that ball is red or white?
- N a test of 4 subjects, Mike gets 96, 60 and 55 in three subjects. If his average (arithmetic mean) mark for all four subjects is 74, what is his fourth mark?
- What is the range and mean deviation for the data set #7, 5, 2, 8, 5, 6#?
- What is the mean of the data values #53,71,89,60,62#?
- Tree diagram were drawn to determine the number of possible outcomes when choosing one of 3 shirts, one of 8 ties, and one of 4 jackets, how many leaves would there be?
- Your video game scores are 64, -13, 73, -5, and 36. What were your lowest and highest scores? What was your mean score?
- A 12 member jury for a criminal case will be selected from a pool of 15 men and 15 women. What is the probability that the jury will have 6 men and 6 women?
- How many different computer passwords are possible if each consists of 4 symbols, the first must be a letter and the other 3 must be digits?
- How many different groups of three kids can you make from seven kids?
- A lottery has a $100 000 first prize, a $25 000 second prize, and five $500 third prizes. A total of 50000 tickets are sold. What is the probability of winning a prize in this lottery?
- Suppose that for a group of consumers, the probability of eating is 0.75 and that the probability of drinking Coke Further suppose that the probability of eating pretzels and drinking Coke is 0.55. Are these two events independent? Why?
- You have a standard number cube. What is the probability of rolling a number less than 3, and then rolling a prime number?
- If two dice are rolled, what is the probability that the sum of the dice is 10?
- A bag contains 6 red balls and 7 green balls. You plan to select 5 balls at random. What is the probability of selecting (without replacement) 5 green balls?
- Jasem wrote down all the 5 digit numbers that contained only the digits 1, 2, 3, 4 and 5. How many numbers were exactly divisible by 5?
- A coin-operated machine sells plastic rings. It contains 4 yellow rings, 15 black rings, 0 orange rings, and 6 purple rings. Sarah puts a coin into the machine. What is the theoretical probability she gets a purple ring?
- A trait has two alleles, represented by #p# and #q#. If #p=0.89#, what is #q#?
- The average score on a standardized test is 750 points with a standard deviation of 50 points. If 2,000 students take the test at a local school, how many students do you expect to score between 700 and 800 points?
- A restaurant offers 12 different appetizers. How many ways can a group of friends share 3 different appetizers?
- If a license plate consists of four digits, how many different licenses could be created having at least one digit repeated?
- What is the probability that an offspring will inherit cystic fibrosis, an autosomal recessive disorder, if both parents are carriers?
- What is the average (arithmetic mean) of all the multiples of ten from 10 to 190 inclusive?
- Antonio puts six different CDs in a CD player and the CD player randomly plays a song from any of the CDs. What is the probability that the CD player will play the first song from the first CD and the first song from the sixth CD?
- A space shuttle requires 3-out-of-4 of its main engines to achieve orbit. Each engine has a reliability of 0.97. What is the probability of achieving orbit?
- Reports on a student's ACT or SAT usually give the percentile as well as the actual score. Tonya scores 1318 on the SAT. What is her percentile?
- Kellie flips a dime and then a quarter. How many results are possible?
- What is the standard deviation for {1,3,4,6,8}?
- How many ways are there to roll a sum of 7 or 11 on two dice?
- If a distribution has a mean of 100 and a standard deviation of 15, what value would be +2 standard deviations from the mean?
- Shanti's teacher gives a 10-point math quiz every week. On the five quizzes given so far Shanti's scores were 10, 9, 5, 7, and 10. What is Shanti's average math quiz score?
- A card is drawn from a standard deck of 52 playing cards. What is the probability that the card is an ace or a king?
- A group of thirty people is selected at random. What is the probability that at least two of them will have the same birthday?
- What is the probability of any particular day being Thursday?
- To one decimal place, what percentage of the area under the normal curve lies between #+-# 2 standard deviations of #mu#?
- What is the mean, median and mode for this list of integers: 21, 15, 16, 25, 13, 18?
- Teesha is in the French club. There are 26 students in the club. The French teacher will pick 3 students at random to guide visiting students from France. What is the probability that Teesha will not be picked as a guide?
- You toss a coin and randomly select a number from 0 to 9. What is the probability of getting tails and selecting a 1?
- A whole number consists of the 2 4, 6, 8, and 0. How many whole numbers are possible?
- A normal distribution has a mean of 142 and a standard deviation of 16. What is the probability that a randomly selected value lies between 142 and 174?
- A coin is flipped 12 times. What is the probability of getting exactly 8 heads?
- When a cube with sides numbered 1 through 6 is rolled one time, what is the probability of rolling a 4 or greater?
- If a jelly bean machine contains 16 pink jelly beans, 34 blue jelly beans, 24 black jelly beans, and 26 purple jelly beans, what is the probability that a jelly bean chosen at random will be blue?
- What is the mean absolute deviation of the set of data 6, 8, 2, 10, 5?
- What is the z-value of something that has an area of .8051 under the standard normal curve to its right?
- Suppose that the sample mean of 12 data points is 25. It is discovered that a data point having value 16 was incorrectly read as 19. What is the revised value of the sample mean?
- How many possible three-digit passwords can be formed using digits 0 through 9 if no digits are repeated?
- The government has decided that the free-market price of cheese is too low. Farmers complain that the price floor has reduced their total revenue. Is this possible?
- Is the median, mode, or mean the most misleading average of 4, 92, 96, and 96?
- Bailey earned the following scores on 6 math tests: 90, 96, 100, 82, 78, 100. Her teacher said she could choose to record either the median or the mean of her test scores. Which should she choose? Why?
- Question #064b4
- The letters in the word "baseball" are placed in a bag. If a letter is picked at random, what is the probability that an "a" will be selected?
- Harriet was rated at her job with a pretest and a posttest. The posttest score counted double. If she scored 88 on the pretest and 93 on the posttest, what was her weighted average?
- If the sample mean = 50, population mean = 44, sample standard deviation = 6, and sample size = 9, what is the one sided t-score of the sample?
- What is the average of 27 and 45?
- What are four numbers that have a mean of 6, median of 5, and mode of 4?
- There are 42 members on the board of directors for a certain non-profit institution. lf they must elect a chairperson, first vice chairperson, second vice chairperson, and secretary, how many different slates of candidates are possible?
- What is the average of 10, 18, and 23?
- Consider the set {4, 5, 7, 7, 8, 8, 12, 13, 13, 15, 18, 20, 22, 24, 26, 27, 27, 37, 43}. What would be an appropriate interval to make a histogram with the data?
- A card game using a standard deck of 52 cards costs $1 to play. If you draw a face card or an even number, you lose. If you draw an ace, you win $5, and if you draw an odd number, you win $2. What is the expected payoff?
- What is the mode of the set of data 13, 11, 4, 5, 6, 9, 10, 12, 15, 16?
- Three chemistry students measured the length of a copper bar. The recorded lengths were 5.05 cm, 5 cm, and 5.1 cm. What is the average length of the bar?
- Tournament a bowling tournament, you bowled three games with scores of 110, 130, and 129, respectively. What is your average score?
- There are four queens in a stack of 52. What is the probability that you will pull a black queen out of the card deck without looking?
- What is the experimental probability that a baby will be a girl, if out of #90# babies born, #50# were girls?
- If the probability of a frost tomorrow is 0.05, what is the probability of not having a frost?
- A study of 600 adults found that the number of hours they spend on social networking sites each week is normally distributed with a mean of 17 hours. The population standard deviation is 6 hours. What is the margin of error for a 95% confidence interval?
- How many different distinguishable horizontal arrangements of 7 identically shaped balls are there if 2 are blue, 3 are red, and 2 are yellow?
- An amusement park has 13 roller coasters. In how many ways can you choose 4 of the roller coasters to ride during your visit to the park?
- What is the probability of drawing a 9 of spades from a 52-card deck given the deck is properly shuffled?
- A cell phone company orders 500 new phones from a manufacturer. If the probability of a phone being defective is 2.6%, how many of the phones are likely to be defective?
- The class results for a math test had a mean score of 78.35 and a standard deviation of 6.24. If a student's score was 87, what was the student's z-score for the test?
- You have the numbers 1-24 written on slips of paper. If you choose one slip at random, what is the probability that you will not select a number which is divisible by 3?
- Scores on a statistics final in a large class were normally distributed with a mean of 75 and standard deviation of 6. What is the 40th percentile of the scores?
- What is the interquartile range of the data set: 9, 30, 2, 48, 42, 18, 81, 5, 55, 73, 11?
- Two power generating units A and B operate in parallel to supply the power requirement of a small city. If there is failure in the power generation what is the probability that the city will have its supply of full power?
- What is the probability of flipping a coin and getting a heads, given that the probability of getting a tails is the same, and there is no chance that the coin lands on its side?
- Question #ea511
- A fair six sided die is rolled four times in a row. What is the probability that die will come up six at least once?
- What are 5 different numbers that together have an average of -12?
- What is the third quartile of the data set $140, $174, $148, $171, $150, $167, $152, $166?
- Why do we square the deviations from the mean when calculating the standard deviation?
- If I flip a coin, what are my chances of getting heads?
- What is the probability that a hand of 13 cards dealt from a standard deck will contain no hearts?
- A random sample of 10 children found that their average growth for the first year was 9.8 inches. What is the 95% confidence interval of the population mean for growth during the first year?
- Suppose the demand and supply equations for wheat per year in a country can be specified as follows ? : Q (D) = 500 – 2P Q(S) = – 100 + 4P P is the price in dollars per thousand bushels and Q is the quantity of wheat in thousands of bushels.
- What is the probability of choosing a red card at random from a pack of cards?
- In a batch of 890 calculators, 12 were found to be defective. What is the probability that a calculator chosen at random will be defective?
- A group of musicians includes 3 drummers, 4 trumpet players, and 5 pianists. How many different jazz trios, each consisting of a drummer, a trumpet player, and a pianist, can be formed from this group of musicians?
- What is the probability of rolling a number higher than 3 on a six sided dice?
- What is the mode of the numbers: 4, 7, 2, 4, 2, 2, 8, 7, 4, 2?
- A coin is tossed 20 times. What is the probability there are 17 tails?
- What is the mode, median, and mean of 28, 39, 42, 29, 39, 40, 36, 46, 41, 30?
- What is the mode, median, and mean of 3, 12, 11, 7, 5, 5, 6, 4, 10?
- What is the purpose of calculating z-scores?
- The incubation time for Rhode Island Red chicks is normally distributed 27 days and standard deviation of approximately 3 days. If 1000 eggs are incubated, how many chicks do we expect will hatch in 27 to 33 days?
- The range of a set of scores is 28. If the highest score is 47, what is the lowest score?
- What is the mean of 6, 8, 2, 4, 11, 5, 8, 10, 3, 4?
- A test was given in which the mean grade was 70% and the standard deviation was 12. a) If a student has a standard score (z) of -2.74, what is the student grade on the test?
- A z score of +1.6 represents a value how many standard deviations above the mean?
- What is the area under the standard normal curve that lies between #Z=0# and #Z=1.51#?
- On a single roll of a pair of dice, what are the odds against rolling a sum of 11?
- Adam tried to compute the average of his 7 test scores. He mistakenly divided the correct sum of all of his test scores by 6, which yielded 84. What is Adam's correct average test score?
- A student has test scores of 68, 75, and 79 points. What must she score on the fourth exam to have an average score of at least 80 points?
- What is the mean absolute deviation of the prices $16, $20, $15, $11, and $13?
- The average (arithmetic mean) of the integers from 200 to 400, inclusive, is how much greater than the average of the integers from 50 to 100, inclusive?
- A bag contains 26 tiles, each with a different letter of the alphabet written on it. You choose a tile without looking. What is the probability that you choose a vowel or a letter in the word GEOMETRY?
- A study of one thousand teens found that the number of hours they spend on social networking sites each week normally distributed with a mean of 15 hours. The population standard deviation is 2 hours. What is the 95% confidence interval for the mean?
- Suppose an experiment consists of randomly drawing a marble out of a bag and replacing the marble. The bag contains 3 yellow, 4 red, and 8 blue marbles. If the experiment was repeated 20 times, how many times would you predict the marble would be yellow?
- Bailey has a bucket that contains 4 purple marbles, 3 pink marbles, 1 black marble, and 2 silver marbles. What is the probability that she picks a silver marble?
- A coin is tossed, and a number cube is rolled. What is the probability of tossing heads, and rolling a 3 or a 5?
- There are 12 face cards in a standard deck of 52 cards. How many ways can you arrange a standard deck of 52 cards such that the first card is a face card?
- What is the mode, median and mean of 52, 61, 49, 52, 49, 52, 41, 58?
- The class average on a math test was 75.5 and the standard deviation was 4.2. What is the z-score for a test score of 81?
- How many distinct four-digit numbers contain the digits 1, 2, 3, and 4 without repetition, if the digit 2 is always immediately followed by the digit 3?
- Suppose you are playing a game in which two fair dice are to rolled. To make the first move, you need to roll doubles or a sum of 3 or 11. What is the probability that you will be able make the first move?
- In a word game, you choose a tile from a bag, replace it, and then choose another. If there are 28 vowels and 12 consonants, what is the probability you will choose a consonant and then a vowel?
- What is the mode, median, and mean of 16, 19, 10, 24, 19?
- Prestige Builders has a development of new homes. There are four different floor plans, seven exterior colors, and an option of either a two-car or a three-car garage. How many choices are there for one home?
- Two urns contain white balls and yellow balls. The first urn contains 2 white balls and 7 yellow balls and the second um contains 3 white and 10 yellow. A ball is drawn at random from each urn. What is the probability that both balls are white?
- What is the percentile for the number 78 in the data set 24, 45, 52, 78, 90, 120, 34, 67, 111, 10?
- There were five people in group A, with a mean lQ of 100, and five in group B, with a mean IQ of 74. When Jack left group A for group B, both means increased, and the total of the two new means was 180. What Is Jack's IQ?
- Question #7b7eb
- When you roll two number cubes, what are the odds in simplest form against getting two numbers greater than 3?
- If you tossed a coin 10 times, what is the probability of landing on tails every time?
- The average of Molly's 5 quiz scores is 9.0. If her highest test score is dropped, her average is lowered to 8.5. What was her highest test score?
- Carl has a piece of toast that has jelly on one side, and he dropped it twice. Both times, it landed with the jelly side up. If he drops it two more times, what is the probability that it will have landed jelly side up a total of three times?
- In how many different orders can 6 runners finish a race?
- The average time a subscriber spends reading the local newspaper is 49 minutes. For the 10% who spend the most time reading the paper, how much time do they spend?
- When a data set is normally distributed, about how much of the data fall within two standard deviations of the mean?
- Of the 232 airports available for public use in Themeliville, 121 are paved and lighted. For a simple random sample of 50, what is the probability that between 27 and 31 of the airports in the sample will be paved and lighted?
- A four-digit serial number is to be created from the digits 0 through 9. How many of these serial numbers can be created if 0 can not be the first digit, no digit may be repeated, and the last digit must be 5?
- How many different ways can the first 10 letters of the alphabet be arranged?
- You reach into a bag of coins and withdrew two coins. What is the probability you withdrew a nickel and then a dime if the bag held ten pennies, six nickels, and five dimes?
- The number of points scored by a basketball team during the first 8 games of the season are 65, 58, 72, 74, 82, 67, 75, 71. How much will their average game score increase by if the team scores 93 points in the next game?
- A sock drawer has 2 blue 4 white pair, 4 black pair. What is the probability you can pick out 1 blue, 1 white, or 1 black?
- What is the mode, median, and mean of 8, 2, 8, 5, 5, 8?
- If we remove all of the queens from a 52-card deck, how many unique four card combinations can we have?
- If a coin is flipped twice and a standard die is rolled twice, what is the probability of getting two heads on the coin and the number 2 on the die twice?
- What is the value of #b# when the arithmetic mean of #b-5# and #2b+1# is #b+2?#
- The mean weight of 32 math students is 98.3 lb. If the students could all stand on the scale together, what would their total weight be?
- The mean of 3 numbers is 7. The mean of 4 other numbers is 8. The mean of 5 other numbers is 11. What is the mean of all 12 numbers?
- Suppose Colby rolls the number cube 100 times. About how many times can she expect to roll a 2?
- What is the mean, mode, range, and median of 55, 50, 58, 55, 60, 54, 56, 58, 58, 54?
- In a class of 300 students, 242 take math, 208 take science, and 183 take both math and science. How many students take neither math nor science?
- In a statistics class there are 11 juniors and 6 seniors; 4 of the seniors are females, 6 of the juniors are males. If a student is selected at random, what is the probability that the student is either a senior or a male?
- What is the median of the data set {16, 15, 17, 19, 12, 11, 14, 14, 13, 11, 18, 15)?
- The probability that a train leaves on time is 0.9. The probability that the train arrives on time and leaves on time is 0.36. What is the probability that the train arrives on time, given that it leaves on time?
- All phone numbers consist of a three-digit area code, a three-digit exchange, and then a four-digit number. A town uses the 587 area code and the exchange 355. How many different phone numbers are possible in this town under the follow conditions?
- You draw a card from a deck numbered 1 through 10 and toss a die. What is the probability of each outcome?
- #Q# and #R# are independent events. If #P(Q)=0.8# and #P(R)=0.2#, what is #P(Q# and #R)#?
- Suppose an experiment consists of rolling a fair, six-sided number If the cube. experiment were repeated 300 times, how many times would you predict the number cube would land on a value greater than 4?
- A key code must contain 4 numerals. There are 9 numerals available. Using numerals, how many different key codes may be created?
- The sum of Cheryl's scores on the first four quizzes in her history class was 364 points. If she scores 96 points on her next quiz, what will be her average score for the five quizzes?
- A bag contains 5 black balls and 3 white balls. Two balls are drawn at random, one after another from the bag without replacement. What the probability that both of the balls have the same colour?
- What is the median of 5, 19, 2, 28, 25?
- The length of a screw produced by a machine is normally distributed with a mean of 0.25 inches and a standard deviation of 0.01 inches. What percent of screws are between 0.24 and 0.26 inches?
- If you flip a coin 6 times, how many of the possible outcomes could include a tail on the second toss?
- Two cards are drawn at random from a standard deck of 52 cards, without replacement. What is the probability that both cards drawn are hearts?
- What is the mean and standard deviation of 5, 10, 12, 15, 20?
- A bag contains five red balls and four yellow balls. If we select two balls at random, what is the probability that the second ball is red given that the first ball was red?
- When rolling a single number cube, what are the odds, in simplest form, in favor of rolling a 4 or a 5?
- An automobile dealer wants to construct a pie graph to represent types of cars will July. He sold 270 cars; 45 of which were convertibles. The convertibles represent how many degrees in the circle?
- What is the median of the numbers 21, 23, 76, 47, 55, 135, 45, 30, 17?
- Thomas records the masses of several rocks as 7.40 g, 7.85 g, 7.60 g, and 7.40 g. What is the mode of Thomas's data set?
- What is the expected value of a lottery offering $100 or a consolation prize of $2 if you do not win, when the probability of winning is .4?
- A random integer is selected from 1000 different integers from 1 to 1000. What if the probability that the integer is divisible by both 3 and 52?
- How many different ways can you choose 3 vowels out of the box, if there are 5 vowels in the box and order does not matter?
- Question #c4443
- The freshman class has 160 students. Each freshman must write three reports from a list of 12 novels that the teacher has assigned them to read. How many different combinations of novels can a freshman student choose to write reports on?
- A school band sold 30 raffle tickets, each labeled with a number from 1 to 30. One winning ticket will be drawn. What is the probability that the number of the winning ticket will be a multiple of 4 or the number 19?
- What is the probability that out of 245 booked reservations that exactly 224 people show up for the flight? What is the probability that no more than 224 people show up? How are these two probabilities different?
- In a hospital ward, there are 16 nurses and 5 doctors. 3 of the nurses and 3 of the doctors are male. If a person is randomly selected from this group what is the probability that the person is male or a doctor?
- What is the probability of having 2,3, or 4 successes in five trials of a binomial experiment in which the probability of success is 40%?
- A person visiting Las Vegas rolls the dice at a "craps" table and wonders what is the probability of rolling the dice 24 times without ever rolling a "7". Can the binomial distribution be applied to this situation?
- In how many ways can 6 graduates line up to receive their diplomas, if there are 4 girls and 2 boys and the girls will receive their diplomas first?
- A stack of cards contains 17 red cards and 9 black cards. What are the odds against drawing a red card?
- At Jefferson Middle School, 12% of the students play volleyball and 5% of the students play volleyball and basketball. What is the probability that a student that he plays volleyball?
- What is the mean, the median, and mode of the set of values: 17, 19, 22, 9, 18, 13, 24, 6, 25?
- A bag contains 3 yellow tennis balls and 4 green tennis balls. Gordy will select one tennis ball, put it in his pocket, and then select a second tennis ball. What is the probability he will get two green tennis balls?
- How many different 2-digit numbers can be made using the digits 3, 7, 8, 9, 2?
- You have 6 Scrabble tiles with different letters of the alphabet in a bag. If you select 3 tiles, how many distinct sequences can you form if the order matters?
- If #P(A) = .7, P(B) = .5#, and #P(B|A)=.4#, what is #P(A# and #B)#?
- Question #f0d61
- Ramla is making a mix CD. She can fit 6 songs on the CD, but has 11 favorite songs to choose from. If the order of songs is important to Ramla, how many different arrangements of 6 songs can she put on her CD?
- Suppose an experiment consists of randomly generating the digits 1-9. lf the experiment were repeated 90 times, how many times would you predict the generated digit to be odd?
- What is the mean of 17, 14, 3, 7, 24?
- What is the median of 102, 108, 112, 120, 143, 149, 1150?
- Trucks versus cars. Consumers are turning to trucks, SUVs, and mini- vans in place of passenger cars. Here are data on sales of new cars and trucks in the United States. ?
- What is the median of the data set 98, 71, 75, 90, 92, 88, 63, 71, 99, 10, 73, 68, 76, 89, 83?
- Alyson has 15 shirts, 6 pairs of pants, and 8 pairs of shoes. How many possible outfits does she have?
- A standard number cube is tossed What is P(greater than 3 or odd)?
- The grade point averages for 10 randomly selected junior college students are 2.0, 3.2, 1.8, 2.9, 0.9, 4.0, 3.3, 2.9, 3.6, 0.8. Assume the grade point averages are normally distributed. What is the 98% confidence interval for the true mean?
- What is the mean of the numbers 21, 23, 76, 47, 55, 135, 45, 30, 17?
- Four different sets of objects contain 3, 5, 6, and 8 objects, respectively. How many unique combinations can be formed by picking one object from each set?
- How many three-letter combinations are possible using the letters D, E, F, G, and H?
- A license plate has two letters followed by three digits. What is the probability that the numbers on the license plate are all odd numbers?
- The probability that a new spark plug is defective is 0.06. You need two new spark plugs. What is the probability that both spark plugs are defective?
- A trait has two alleles, represented by #p# and #q#. If #p=.35#, what is #q#?
- What is the value of the 30th percentile of the set of data: #18, 9, 7, 5, 11, 7, 17, 20, 19, 2, 17, 12, 5, 1, 13, 12, 11, 15, 16, 20#?
- In how many different ways can the positions president, vice president, and treasurer be chosen from the 18-member math team?
- A basket contains 8 pieces of fruit: 3 apples, 3 oranges, and 2 bananas. Jonas takes a piece of fruit at random from the basket, and then Beth takes a piece at random. What is the probability that Jonas will get an orange and Beth will get an apple?
- A bag contains 4 red marbles, 6 blue marbles, and 8 green marbles. One marble is to be chosen at random. What is the probability that the chosen marble will be green?
- What is the standard deviation of the data set #78, 90, 456, 676, 111, 381, 21# rounded to the nearest tenth?
- What is the 66th percentile of the data set 24, 45, 52, 78, 90, 120, 34, 67, 111, 10?
- What is the regression equation based on the following?: {(1,2),(2,3),(4,2),(5,6),(8,7)}
- What is the minimum, maximum, and range of the data 30, 24, 8, 21, 35, 23, 23, 19, 13, 17?
- A car has 12 choices for outside color, 5 choices for interior design, 3 different tire packages, and 3 different engine sizes. How many different cars can be produced?
- What is the mode of the data set 3, 7, 9, 2, 5, 3, 4, 6, 1, 0?
- What is the standard deviation of the data set #87, 21, 90, 43, 54, 23, 123, 110, 90, 44,# and #50#?
- Michael has 4 red shirts, 3 green shirts, and 5 blue shirts in his closet. If he randomly selects a shirt what is the probability that he chooses blue or red?
- A box contains 4 oranges, 9 apples, and 3 pears. Liliana selects a piece of fruit from the box at random. What is the probability that she selects an orange or a pear?
- What is the mean of the prices $8, $19, $7, $3, $3?
- Suppose #Q# and #R# are independent events. What is #P(Q# and #R#) if #P(Q) = 7/15# and #P(R)=4/7#?
- What is #(""_7P_6)/(""_7P_4)#?
- A lunch menu has 4 different sandwiches, 2 different soups, and 5 different drinks. How many different lunches consisting of a sandwich, a soup, and a drink can you choose?
- You toss a coin and roll a number cube. What is P(heads and an even number)?
- 6 bananas are to be selected from a group of 8. In how many ways can this be done?
- Forty tickets are sold for a raffle with two prizes. You buy two tickets. What is the probability that you will win both prizes?
- Jordan makes 65% of his free throws in basketball. What is the probability that he will make the next two free throws?
- In a word game, you choose a tile from a bag, replace it, and then choose another. If there are 28 vowels and 12 consonants, what is the probability you will choose a consonant and then a vowel?
- A standard number cube is tossed. What is P(greater than 2 or even)?
- In how many ways can 6 bicycles be parked in a row?
- A total of 6 family members will appear in a portrait. If 4 of the family members may sit in the front row, how many combinations of family members may sit in the front row?
- What is the probability of rolling a number greater than or equal to 8 with the sum of two dice, given that at least one of the dice must show a 6?
- You toss 5 coins. What is the probability that all 5 show heads?
- Question #f7631
- Suppose a bag contains 4 white chips and 6 black chips. What is the probability of randomly choosing a white chip, not replacing it, and then randomly choosing another white chip?
- Question #e37a2
- You roll a blue number cube and a green number cube. What is P(a number greater than 2 on the blue cube and an odd number on the green cube)?
- How many different ways can 9 people line up for a picture?
- Question #bdd78
- How do you simplify #(""_12P_10)/(""_12P_2)#?
- A multiple choice test has 5 questions each with 5 possible answers. What is the probability of guessing all the questions correctly?
- A number is selected, at random, from the set {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}. What is P(odd)?
- Two number cubes are rolled. What is the probability of rolling a sum of 9 or a sum that is even?
- What is the number of ways to arrange 8 objects from a set of 12 different objects?
- How do you find the experimental probability of a compound event?
- What is the geometric mean of 275 and 11?
- How do you find the median for the set of data 25, 29, 32, 21, 41, 21?
- In a hospital ward, there are 10 nurses and 6 doctors. 4 of the nurses and 3 of the doctors are male. If a person is randomly selected from this group, what is the probability that the person is female or a doctor?
- In how many ways can 4 people be seated in a row of 12 chairs?
- In how many different orders can you line up 4 cards on a table?
- The students in Mr. Trumbull's English class need to read 2 books from a list of 7 books. How many different combinations of books are possible?
- Marcos is doing a card trick using a standard 52-card deck. He shows his friend a card, replaces it, and then shows his friend another card. What is the probability that the first card is a club and the second card is not a heart?
- At Taft High School, 59% of all students participate in sports and 23% participate in both sports and volunteer activities. What is the probability that a student participates in volunteer activities given that the student participates in sports?
- The mean of a data set is 7.8, the mode is 6.6, and the median is 6.8. What is the least possible number of data values in the set?
- If the probability of winning a certain card game is 65%, what is the probability of not winning the game?
- Is #""_12C_9# greater than or less than #""_12C_7#?
- What is the mode of 10, 4, 13, 11, 12?
- A bag contains 6 cherry, 8 strawberry, and 9 grape flavored candies. What is the probability of selecting a grape or a strawberry flavored candy?
- Sienna tossed 10 heads when tossing a coin 24 times. What is the experimental probability of tossing heads?
- A bag contains 5 red marbles, 7 green marbles, and 3 orange marbles. What is the probability of drawing a red marble?
- Question #19ef1
- Question #7b172
- In many ways can 8 different cars parallel park along one side a street if there is room for all 8 cars?
- The weather forecast says that there is a 30 percent probability of rain. What are the odds in favor of rain?
- In how many ways can 6 books be arranged on a shelf?
- Dr. Sox drives through two stoplights on her way to work. The first light is green for 20 seconds out of each minute. The second light is green for 35 seconds out of each minute. What is the probability that Dr. Sox will hit two green lights?
- A set of data with a mean of 45 and a standard deviation of 8.3 is normally distributed. What is the value that is -1 standard deviation away from the mean?
- John's average score on three tests is 87%. What is the least he can score on his fourth test so that his average grade will be at least 90%?
- A local restaurant sells sandwiches with 5 different choices for bread, 7 types of meat, and 4 types of cheese. You can also choose to add mayonnaise, mustard, both, or neither. How many different combinations are possible?
- Erin has 6 colors of ribbon: red, white, gold, green, blue, and purple. She makes bows from 3 different colors of ribbon. How many different combinations of colors can she choose?
- Given the word 'Asasi'. how many ways can three of the letters be chosen and written in a row?
- Question #60a21
- A couple wants to have 3 kids. What is the probability all three kids are girls?
- Lenny rolls two number cubes. What is the probability that the sum of the the numbers Lenny rolls is either 4 or 7?
- You roll a number cube twice. What is the probability of rolling an odd number and a 2 or a 4?
- If the probability of an event occurring is #1/4#, what is the probability of its complement?
- What is the median of 5, 7, 7, 10, 13, 31, 35, 35, 38, 40, 45?
- A student test scores are 87, 95, 76, and 88. He wants an average of 85 or better overall. What is the minimum score he must get on the last test in order to achieve that average?
- What is the number of unique possible screen names if Gaga wants to use the arrangement of her first name followed by arrangements of the year of her birth 1986?
- How many different three-person relay teams are possible with four people?
- A set of 5,000 on a college readiness exam are known to be approximately normally distributed with mean 72 and standard deviation 6. To the nearest integer value how many scores are there between 63 and 75?
- What is the median of the set of numbers: 127, 135, 142, 127, 109, 164, 155, 184, 155, and 169?
- If four friends buy tickets to a concert with assigned seats, how many different ways can they be arranged in those four seats?
- A bowl of fruit is on the table. It contains six apples, two oranges, and four bananas. Daniel and Sean come home from school and randomly grab one fruit each. What is the probability that both grab oranges?
- Jennifer has the following data: 17, 7, 5, #n#. If the mode is 17, what number does #n# have to be?
- Question #3c4f3
- A coin is flipped 18 times, and it comes up tails 12 times. What is the experimental probability of the coin's coming up tails?
- What is the standard deviation of {7, 2, 4, 6, 8, 11}?
- Two cards are drawn at random from a standard deck of 52 cards. What is the probability that both cards are aces?
- The average of #x# and #y# is #5# and the average #x, y,# and #z# is #8#. What is the value of #z#?
- From 8 names on a ballot, a committee of 3 will be elected to attend a political national convention. How many different committees are possible?
- The probability that Tara receives spam e-mail is 15 percent. If she receives 80 e-mails in a week, about how many of them can she expect to be spam?
- You have a coin which is loaded so that the probability of tossing heads is .55. If you toss the coin three times, what is the probability that you will obtain three heads?
- Let the random variables X and Y have the joint pmf #f(x,y)=(x+y)/32#, #x=1,2#, and #y=1,2,3,4#. What are the means #mu_x# and #mu_y#, the variances #sigma ""_x^2# and #sigma "" _y^2#, and the correlation coefficient #rho#?
- Chrissy has 4 white towels, 2 yellow towels, and 3 blue towels in a bag. What is the probability that the first towel chosen at random from the bag will be white?
- In how many ways can five models line up to have their photograph taken?
- Two dice are rolled together and X is the highest score minus the lowest score of the dice. What are the possible values of X?
- What is the geometric mean of 8 and 18?
- Geoff needs to create a password for his E-mail account. The password must have three letters. How many different passwords can he make?
- What is the probability of tossing a penny and landing on heads three times in a row?
- A time for the 100 meter sprint of 14.9 seconds at a school where the mean time for the 100 meter sprint is 17.6 seconds and the standard deviation is 2.1 seconds. What is the z-score for this observation?
- Jonathan's math test scores were 87, 93, 85, 62, and 95. What was his mean score?
- If John's bowling scores were 120, 144, 143, 111 and 167, how do you find his average score?
- What is the average deviation of #1.76, 2.28, 1.90#?
- In a normal distribution of 100, what percent of scores would be expected to find between z=1.30 and z=1.90 ?
- The pies sold 869 pies during the month of January. What was the mean number of pies sold per day?
- If Evelina's bowling scores were 133, 155, 176, and 132, how do you find her average score?
- A fan of country music plans to make a custom CD with 11 of her 28 favorite songs. How many different combinations of 11 songs are possible?
- In a basket of rambutans and bananas ,70% of rambutans and 60% of the bananas are ripe.If 40% of the fruits in the basket re rambutans.find the probability of the fruits which are ripe.Find probability of rambutans given the fruits are ripe?
- Why is the standard deviation an important measure of variance?
- You draw two cards from a standard deck of 52 cards, but before your second card, you put the first one back and reshuffle the deck. Are the outcomes on the two cards independent?
- In a class test where the mean was 62% and the standard deviation 12.6%, Jan received 74%. What is her result a a z-score?
- A medical researcher says that less than #25%# of US. adults are smokers. In a random sample of #200# US. adults, #18.5%# say that they are smokers. At #alpha = 0.05#, is there enough evidence to reject the researchers claim?
- Jess owns 4 red shirts, 2 blue shirts, and 3 white shirts. She chooses a shirt to wear at random. What is the probability that she chooses a white shirt?
- What is the median of this set of data: 86, 72, 65, 82, 91, 94?
- Question #d0f63
- What is the probability of choosing a red marble from a jar containing 5 red, 6 green, and 4 blue marbles?
- Of the 34 cars in a parking lot, 20 are green, 8 are gold, and the rest are black. What are the odds against the next car leaving the lot being black?
- A number cube is rolled 30 times, and a six comes up 5 times. What is the experimental probability that a six is rolled?
- Two 6-sided dice are rolled. What is the probability that the sum of the two numbers will be greater than 8?
- What is the probability of not tossing three heads with three fair coins?
- The Thomas family spent $200 on groceries, $240 dining out, and $40 on school lunches last month. Their monthly income is $6,000. How many degrees in a circle graph would their food budget require?
- At a medical clinic, the average waiting time for the first 10 patients was 15 minutes and the next 15 patients, 20 minutes. What was the average waiting time for all the patients?
- Joe has homework assignments for Math, Spanish, and History. In how many different orders can he do his homework?
- A dryer contains 8 black socks, 6 blue socks, 10 white socks, and 4 gray socks. If Martha reaches into the dryer, what is the probability that she will choose 2 white socks without replacing the first sock?
- There are 12 standbys who hope to get on your flight to Hawaii, but only 6 seats are available on the plane. How many different ways can the 6 people be selected?
- Last year an accounting firm paid each of its five clerks $25 000, two accountants $60 000 each, and the firm's owner $225 000. a) What is the mean salary paid at this firm? b) How many of the employees earn less than the mean?
- A restaurant's menu contains 3 appetizers 5 main dishes, and 2 desserts. How many different meals can be ordered?
- You are scooping ice cream as part of your training at an ice cream shop. The weight of the scoop must be 4 ounces with an absolute deviation of .5 ounce. What is the maximum and the minimum amount of ice cream that are acceptable?
- Sarita flipped a fair coin and it landed showing heads 30 times out of 50. What is the theoretical probability of getting heads the next time?
- What is the #Z#-score value that separates the top #70%# of a normal distribution from the bottom #30%#?
- What is the mean and range of 18, 23, 10, 39, 22, 17, 16, 15?
- If a coin and a die are tossed, what is the probability of getting a head on the coin and an even number on the die?
- The probability that it rains is 1/5. the probability that there will be heaby traffic jam is 1/20 if it rains and 1/50 if it does not rain.Find the probability that it rains if there is a heavy traffic jam ?
- A box contains 3 red balls and 4 green balls. If two balls are randomly selected in sequence, what is the possibility that a red ball and a green ball are picked out of the box?
- A bag of 33 tulips contains 13 red tulip bulbs, 11 yellow tulip bulbs and 9 purple tulip bulbs. What is the probability that two randomly selected tulip bulbs are both red?
- What are the two types of probability. How are they different?
- A sample of #n=25# scores has #M=20# and #s^2=9#. What is the sample standard deviation?
- What is the range for the set of data: #22, 36,7, 19, 56#?
- What is meant by Mean?
- You are on your way to Hawaii and of 15 possible books your parents say you can take 10. How many different collections of 10 books can you take?
- The probability that Ann passee statistics test is 5/7 and the probability that she passee economic test is 3/7.If the probability of passing at least one course is 6/7,what is the probability that she will pass both test?
- Question #d87c1
- What are the minimum, first quartile, median, third quartile, and maximum of the following data set?: 37, 42, 44, 46, 47, 49, 51, 53, 54, 55, 57, 61, 63
- What to do if a problem has a non-tabled degrees of freedom?
- What are the odds against getting three tails when you flip three coins?
- If 12 students run in a class election where each student running can be elected to one of three positions, how many different outcomes are there for President, Vice President and Secretary?
- At a certain hospital, 40 patients have lung cancer, 30 patients smoke, and 25 have lung cancer and smoke. Suppose the hospital contains 200 patients. If a patient chosen at random is known to smoke, what is the probability that patient has lung cancer?
- If you select one of 6 differently numbered cards and roll a 6-sided number cube, how many possible outcomes are there?
- What is the geometric mean of #2/3# and #216#?
- The probability of rain and hail during a storm is 16%. The probability of only rain is 78%. What is the probability of hail given that there is already rain?
- J. Michael has a bag of 23 pieces of dried fruit. The bag contains l0 banana chips. What the probability that J. Michael will choose a banana chip when he reaches into the bag?
- You pick a card from a shuffled pack and draw a king. You put it back in the pack, shuffle, and then pick another card. This time you draw a queen. How are the two events of picking a king and picking a queen related?
- 8 of the 40 newly built cars are selected at random to be checked for steering defects. Suppose 10 of the cars have such defects. What is the probability that all 8 of the selected cars have steering defect?
- A number cube is labeled 1 through 6. What is the probability of rolling a number that is divisible by 3?
- Question #747b6
- How many ways are there to choose a card from a deck of cards (52 cards in a deck) and roll a regular 6-sided number cube?
- Question #267fb
- If Debbie has 3 blouses and 4 skirts, how many different outfits of a blouse and skirt can she wear?
- A bag contains 3 red, 5 yellow, and 7 purple marbles. What is the probability of drawing a purple marble followed by a red marble?
- If you roll a die what is the probability getting a number greater than 2?
- For some civil cases, at least 10 of twelve jurors must agree on a verdict. How many combinations possible on a twelve-person jury?
- If a fair coin is tossed 6 times, what is the probability to get exactly 2 heads? at most 2 heads?
- At a convention there are 7 math instructors, 5 computer science instructors, 3 statistics instructors and 4 science instructors. If an instructor is selected at random, what is the probability of selecting a math or science instructor?
- A spinner has 8 equal sections. If you spin the spinner twice, what is the probability that you will get a 4 the first time and a 7 the second time?
- A card is drawn at random from a standard deck of 52 playing cards. What is the probability that the card is black or a face card?
- Of the 30 cars in a parking lot, 12 are blue, 8 are red, 6 are white, and 4 are silver. In simplest form, what are the odds in favor of a red or white car leaving first?
- Two tetrahedral dice with faces marked 1,2,3 and 4 are thrown. The score obtained is the sum of the numbers on the bottom face. Tabulate the probability distribution for the score obtained,how?
- The weight of football players is normally distributed with a mean of 200 pounds and a standard deviation of 25 pounds. What is the minimum weight of the middle 95% of the players?
- The mean age of 5 people in a room is 30 years. A 36 year old person walks in. What is now the mean age of the people in the room?
- Which of the mean,median and mode of a list of numbers must always appear as one of the numbers in the list ?
- Consider the small set of data: 8,4,1,9,1,5. a) How to find the mean,median and mode of these data. b) How would they change if you subtracted 1 from each data ? c) How would they change if you add 2 from each data ?
- Suppose X is a discrete random variable and k is a constant. If E(3X+k)=26 and E(2k-X)=3 , what is E(X)?
- You have a coin which is loaded so that the probability of tossing heads is .20. If you toss the coin three times, what is the probability that you will obtain three heads?
- When you roll two number cubes, what are the odds in simplest form against getting two numbers greater than 4?
- A random sample of 16 students showed an average age of 25 years and a standard deviation of 2 years. The 98% confidence interval for the true average age of students is what?
- What is the probability of rolling a 2 on a six-sided die? What is the probability of rolling two 2s on two six-sided die?
- Question #a91e5
- The following list gives the number of siblings for each of 13 students: 3, 2, 4, 4, 1, 3, 2, 0, 1, 3, 2, 2, 4. What are the modes of this data set?
- Question #9e935
- Tommy is making a greeting card on his computer. He can choose 1 of 4 backgrounds, 1 of 7 photos, and 1 of 6 text colors. How many ways can Tommy make a greeting card?
- Jeremy Lin can hit a free throw 81% of the time. Suppose that every free throw is an independent event. In a 10- free throw practice, what is the probability that Jeremy Lin will hit all 10 shots?
- A set of data contains 200 elements. How do you find the median of the data?
- You want to make five-letter codes that use the letters A, F, E, R, and M without repeating any letter. What is the probability that a randomly chosen code starts with A?
- What is the standard deviation of {77, 26, 41, 26, 84, 21}?
- Katifs grades on five math quizzes are 9, 7, 10, 6, and 10. What is the median of his quiz grades?
- What is the mean of 6.1, 5.9, 4.2, 5.9, and 10.7?
- What is the mode of the following: 14.8, 16.3, 8.8, 12.3, 8.1? Is there a mode?
- A software company is hiring for two positions: a software developer and a sales operations manager. How many ways can these positions be filled if there are 17 people applying for the developer position and 15 people for the sales position?
- Fifteen percent of all students at a large university are absent on Mondays. If a random sample of 12 names is called on a Monday, what is the probability that all students are present?
- Mary chooses an integer at random from 1 to 6. What is the probability that the integer she chooses is a prime number?
- Friday night Joe decided to order a 1-topping pizza. He had a choice of thin or thick crust and a choice of five toppings. How many different pizzas could he choose from?
- A number cube is rolled 24 times and lands on 2 four times and on 6 three times. What is the experimental probability of landing on a 2?
- When 339 college students are randomly selected and surveyed, it is found that 111 own a car. How do you construct a 95% confidence interval for the percentage of all college students who own a car?
- What is the probability of rolling a fair die and not get an outcome less than 3?
- Mr. Shenton received scores of 58, 72, 74, 92, 84, 40, 74, 81, 76, and 83 on his exams. What is the median score?
- The probability of event A occurring is 50%, and the probability of event B occurring is 25%. Events A and B are nonsimultaneous events. What is the probability that event A occurs but event B does not occur?
- Question #f2635
- Two friends are taking an English class that has a monthly reading list. If there are 3 mystery and 4 romance books left, what is the probability that both friends randomly select different romance books, one after the other?
- Of the water lilies in the pond, 43% are yellow. The others are white. A frog randomly jumps onto a lily. What is the complement of the frog landing on a yellow lily and its probability?
- Alice has 6 dresses, 2 coats, and 3 hats. How many different outfits can she wear consisting of a dress, a coat, and a hat?
- Two cards are randomly chosen from a standard deck of 52 playing cards without replacement. What is the probability both cards will be hearts?
- If you separate all the clubs from a deck of cards and pick 3 of those 13 cards, what is the probability that the cards are jack, queen, and king in ascending or descending order?
- How many different arrangements of 5 letters can be made using the letters in the word "FLOOR"?
- What is the value of #""_5P_1#?
- What is the total number of possible 5-letter arrangements of the letters D, I, S, C, and O, if each letter is used only once in each arrangement?
- In a fish tank, there are 24 goldfish, 2 angel fish, and 5 guppies. If a fish is selected at random, what is the probability that it is a goldfish or an angel fish?
- A credit card company randomly 9 generates temporary four digit passcodes for cardholders. Serena is expecting her credit card to arrive in the mail. What is the probability that her pass code will consist of four different odd digits?
- What is the probability of having three girIs in a row in one family? What is the chance of having a fourth girl?
- What is the mean of 158, 213, 107, 213, and 213?
- A boy has 3 shirts, 2 pairs of slacks, and 3 pairs of shoes. What is the total number of possible outfits he can wear consisting of a shirt, a pair of slacks, and a pair of shoes?
- How many arrangements can 4 women and 4 men be placed in a line if all the women line up first?
- Question #138e2
- A bag contains 4 red marbles and 5 blue marbles. If two marbles are chosen at random, one at a time and without replacement, what is the probability of getting two red marbles?
- Kayleen flips a coin and it lands on tails. She says that next time it will be heads for sure. Is Kayleen right or wrong?
- How do you express the conﬁdence interval #0.111 < p < 0.333# in the form #p +- E#?
- How many different three-member teams can be formed from six students?
- Individuals who have a certain gene have a 0.48 probability of contracting a certain disease. Suppose that 1,863 individuals with the gene participate in a study. What is the standard deviation of the number of people who eventually contract the disease?
- How many possible outcomes are there when flipping a coin 10 times?
- To win a particular lottery game a player chooses 5 numbers from 0 to 63. If all five numbers that the player selected match the winning numbers in any order, then the player wins. What is the probability that the winning numbers are 7, 0, 29, 45, and 60?
- How many words can be formed from the letters of the word 'computer' if each letter is to be used once?
- A standard die is rolled 4 times. What is the probability of rolling two 1s, one 2, and one 3?
- Imagine tossing a fair coin 3 times. What is the sample space for this chance process, and what is the assignment of probabilities to outcomes in this sample space?
- A random sample of 40 part-time workers has a mean annual eamings of $3120 and a population standard deviation of $677. What is the 95% confidence interval for #mu#?
- What is a linear regression equation?
- In a bag of M&M's you have 8 reds, 10 browns, 6 yellows, and 6 greens. What is the probability of picking a red, then a brown, then a green, and then a yellow M&M?
- What are the odds of rolling a number less than 3 when a fair die is rolled?
- Trevor bought 3 new pairs of jeans and 2 new sweaters for school. How many different clothing combinations can he make?
- If you roll 2 dice with numbers 1 through 6 on the sides, how many total sums could you get adding the numbers together on each face?
- A survey of 144 retail stores revealed that the average price of a microwave was $375 with a standard error of $20. What is the 80% confidence interval of the true average price of the microwave?
- Question #5d014
- An election ballot ask voters to select four city commissioners from a group of 15 candidates. In how many ways can this be done?
- There are 98 ﬂowers in the bride's bouquet. If 25 of the ﬂowers are roses, approximately what percent of the flowers in the bouquet are not roses?
- If there are 5 different games to buy and you only want to buy 3, how many combinations are there?
- F two cards are drawn without replacement from an ordinary deck, what is the probability that the second card is red, given that the first card was a heart?
- If 2% of the batteries manufactured by a company are defective, what is the probability that in a case of 144 batteries, there are 3 defective ones?
- Let Y={a,b,c,d,e,f,i,j} and a 4letter word is to be formed without replacement.How many words can be formed if the word must contain both vowels and consonants?
- Question #f6c62
- What is mean and standard deviation of the following data: 2, 4, 7, 10, 12?
- 5 girls and 2 boys are arranged in a straight line for several photographs to be taken. How many different arrangement are possible if (a)there are no restrictions(b) the boys must be separated?
- Question #958ab
- What are the variance and standard deviation of {49, 49, 52, 53, 58, 62, 68, 75}?
- What is the difference between modal and median value of the following set: {20.0, 20.4, 21.6, 20.8, 22.2, 19.4, 20.6, 21.3, 19.0, 20.6, 19.9, 19.3, 20.3, 20.9, 20.1, 19.5}?
- Past ﬂu cases in the Remulak school system #(n = 500)# were 15 per week. For the entire state, the weekly average was 16 and the standard deviation was 15.1. Are the kids in Remulak as sick as kids throughout the state?
- If a group of data has a mean of 9 and a standard deviation of 2.5, what is the interval that should contain at least 93.8% of the data?
- A random sample of size 36 is to be selected from a population that has a mean of μ = 50 and a standard deviation of 10. What is the standard score for a sample value of 40?
- A fair die is tossed once. Let the event {A} is getting an even number, the event {B} - number 2 #>=# 3. How do you find P(A U B), P(A/B)? Are the events A, B dependent or not?
- If you roll a die #100# times and get #15# ones, what is the probability that the die is not fair? What about if you get #5# ones?
- Question #b9a4f
- A contractor has a 0.05 probability of making 200,000, a 0.5 probability of making 14,000, a 0.02 probability of losing 1,100,000, and a 0.43 probability of breaking even. What is the contractor‘s expected value?
- A linear regression equation for a data set has a correlation coefficient of r=0.4. Would you be conﬁdent using your equation to predict what will happen outside of the data set?
- Question #d4ff9
- Question #67bb2
- If every person in a room shakes the right hand of every other person in the room, there are 36 possible handshakes. How many people are in the room?
- If six pairs of data yield an r = 0.789 and a regression equation of y= 4x-2, what is the best predicted value of y when x = 5?
- Among the contestants in a competition are 43 women and 21 men. If 3 winners are randomly selected, what Is the probability that they are all men?
- The probability that a contractor will get a plumbing contract is 2/3 and the probability that he will get an electric contract is 5/9. If the probability of getting at least one contract is 4/5, what is the probability that he will get both?
- The 6 entries in Claudia's checkbook ledger show both deposits and withdrawals. Claudia wrote down $100, -20, -35, $250, -$150, and -85. What is the mean dollar amount for these entries?
- Question #50c00
- What is the probability of drawing a 6 from a deck of cards?
- 10 apples, 4 of which are rotten, are in the refrigerator. 3 apples are randomly selected without replacement. Let the random variable x represent the number chosen that are rotten. What is the mean and standard deviation of x?
- What is the formula #("group size")/("total population")times"sample size"# used for?
- Question #6376d
- Question #ce2b6
- Question #6f7ed
- Question #d8b61
- Question #ecb31
- Question #26b22
- Question #d397d
- 1545 subjects were given ginko & 1524 placebo. In ginko group, 246 developed dementian & in the placebo it was 277 with dementia. Significance level=0.01 to test claim(ginko is effective in dementia) Can you test claim and construct confidence interval?
- Question #cba2e
- Question #8b55f
- Men ages(20-29) have meanheight 69.3 with s.dev of 2.5 in. An analyst wonders if sd of majorleague players less than 2.5 in. Heights of 20 random players are:72, 74, 71, 72,76,70,77,75,72,72,77,73,75,70,73,74,75,73,74,73. Can you help me find the P value?
- Question #05ff8
- Question #8fed0
- Question #e84c9
- Question #df3e8
- Question #2c61e
- Question #1d64f
- Question #a04d8
- Question #8f072
- Question #80edb
- Question #70a57
- Question #fd2d3
- Question #b8f5a
- Question #9c722
- Question #a8f53
- Question #b1268
- Question #24116
- Question #8d994
- Question #a4d78