Organizing and Summarizing Data
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Measures of Center
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Measures of Variability
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Categorical Graphs
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Simple Quantitative Displays
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Frequency Distribution
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The Histogram
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Measuring Relative Position
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Boxplots
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Linear Transformations
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What is Statistics?
Producing Data
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Sampling Techniques
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Observational Studies, Experiments, and Surveys
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Experimental Design
Probability
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Basic Probability Concepts
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Combinations and Permutations
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Addition Rule
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Multiplication Rule
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Conditional Probability
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Venn Diagrams and Tree Diagrams
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Two-Way Tables
Statistical Distributions
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Uniform Distribution
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The Standard Normal Distribution
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Real-Life Applications of the Normal Distribution
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Assessing Normality
Random Variables
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Probability Distribution
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Mean and Standard Deviation of a Probability Distribution
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Law of Large Numbers
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Addition Rules for Variances
Binomial and Geometric Distributions
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Properties of a Binomial Experiment
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Calculating Binomial Probabilities
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Geometric Probabilities
Sampling Distributions
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Sampling Distribution and Statistics
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Sampling Distribution of a Proportion
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Central Limit Theorem
Statistical Inference Overview
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Confidence Intervals
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Hypothesis Testing
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Statistical Significance
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Type I and Type II Errors
Inference with the z and t Distributions
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One-sample z test
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Two-sample z test
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z Confidence intervals for the Mean
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One-sample t test
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Matched-pair t test
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Two-sample t test
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t Confidence intervals for the Mean
Inference for Proportions
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Confidence Intervals for p
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One-sample Hypothesis Test for p
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Two-sample Hypothesis Test for p
Chi-Square Procedures
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Chi-Square Distribution
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Goodness of Fit Test
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Chi-Square Tests for Independence and Homogeneity
Linear Regression and Correlation
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Independent and Dependent Variables
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Least Squares Regression Line (LSRL)
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Residual Plots and Outliers
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Correlation and Coefficient of Determination
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Confidence Interval for the Slope
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t Test for the Slope and the Correlation Coefficient
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Prediction Intervals
Advanced Topics
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Hypothesis Testing for the Standard Deviation
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Nonlinear Transformations of Data
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Nonparametric Statistics
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Analysis of Variance
Uncategorized Questions
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Question #f2635
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Question #267fb
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How many possible outcomes are there when flipping a coin 10 times?
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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?
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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#?
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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?
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What is the probability of rolling a fair die and not get an outcome less than 3?
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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?
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Katifs grades on five math quizzes are 9, 7, 10, 6, and 10. What is the median of his quiz grades?
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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?
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What is the probability of getting a sum of either 7, 11, or 12 on a roll of two dice?
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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?
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What is the probability of having three girIs in a row in one family? What is the chance of having a fourth girl?
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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?
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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?
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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?
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Two cards are randomly chosen from a standard deck of 52 playing cards without replacement. What is the probability both cards will be hearts?
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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?
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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?
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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?
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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?
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In how many different ways can 4 students be arranged in a row?
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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?
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How many words can be formed from the letters of the word 'computer' if each letter is to be used once?
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How many arrangements can 4 women and 4 men be placed in a line if all the women line up first?
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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?
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Mr. Shenton received scores of 58, 72, 74, 92, 84, 40, 74, 81, 76, and 83 on his exams. What is the median score?
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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)?
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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?
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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?
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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?
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If Debbie has 3 blouses and 4 skirts, how many different outfits of a blouse and skirt can she wear?
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What is the value of #""_5P_1#?
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How many different three-member teams can be formed from six students?
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What is the mode of the following: 14.8, 16.3, 8.8, 12.3, 8.1? Is there a mode?
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What is the mean of 158, 213, 107, 213, and 213?
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What is the mean of 6.1, 5.9, 4.2, 5.9, and 10.7?
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Given the word 'Asasi'. how many ways can three of the letters be chosen and written in a row?
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Question #138e2
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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 ?
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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?
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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?
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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?
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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?
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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?
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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?
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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?
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Of five letters (A, B, C, D, and E), two letters are to be selected at random. How many possible selections are there?
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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?
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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?
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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?
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How many different arrangements of 5 letters can be made using the letters in the word "FLOOR"?
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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?
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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?
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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?
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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?
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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?
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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?
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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?
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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?
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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?
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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?
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Mary chooses an integer at random from 1 to 6. What is the probability that the integer she chooses is a prime number?
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What to do if a problem has a non-tabled degrees of freedom?
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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?
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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?
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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?
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Katie has 8 black marbles, 12 clear marbles, and 14 blue marbles in a bag. If she picks one at random, what is the probability that she will pick a black marble?
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Question #9e935
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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?
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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?
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A set of data contains 200 elements. How do you find the median of the data?
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Question #7b172
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Question #a91e5
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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?
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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?
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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?
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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?
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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?
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For some civil cases, at least 10 of twelve jurors must agree on a verdict. How many combinations possible on a twelve-person jury?
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What is the mean, median, mode, and range of 5, 30, 35, 20, 5, 25, 20?
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What are the two types of probability. How are they different?
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What is the range for the set of data: #22, 36,7, 19, 56#?
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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?
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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?
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Question #7b7eb
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A toy company is making name plates for children. They will only use 6 spaces, and include only letters. How many combinations are possible?
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What is the mean and range of 18, 23, 10, 39, 22, 17, 16, 15?
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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?
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When you roll two number cubes, what are the odds in simplest form against getting two numbers greater than 4?
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What are the odds against getting three tails when you flip three coins?
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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?
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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?
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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?
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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?
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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)?
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What is the geometric mean of 5 and 15?
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What is the median number for the numbers 4, 8, 10, 5, 9?
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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. ?
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A sample of #n=25# scores has #M=20# and #s^2=9#. What is the sample standard deviation?