Answers created by Geoff K.

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• 10) A jury pool of consists of 50 potential jurors. In how many ways can a jury of 12 be selected?
  
• 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 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?
  
• Two angles that share a common vertex and a common side between them are called what kind of angles?
  
• How do you decrease £40 by 15%?
  
• What fraction is equivalent to 3/8 and has four as the denominator?
  
• Statistics help?
  
• What is the probability that the next person will be assigned an aisle seat?
  
• What is the Surface area of a prism?
  
• The apothem of a decagon is #15#m. Its area is #1595# squared meters. Find the length of one of the sides? Round to #2# decimal places.
  
• Why is it important the order we write the vertices of a triangle in a congruent statement?
  
• A pyramid has a base in the shape of a rhombus and a peak directly above the base's center. The pyramid's height is #7 #, its base has sides of length #3 #, and its base has a corner with an angle of #(3 pi)/4 #. What is the pyramid's surface area?
  
• Question about contingency table?
  
• 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.
  
• 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.
  
• Question about Pareto diagram?
  
• How do you solve the following linear system: # 2x+ 3y=-1 , x+4y=1 #?
  
• What is the circumference of a circle with a diameter of 17 m?
  
• Help me about mathematical statistics please? I really need help for preparing my midterm in mathematical statistics. Thank you very much for your help.
  
• A school attendance clerk noticed that the first week after winter break 5 students were out with the flu. By the end of the second week, a total of 7 students had come down with the flu at one time and by the third week 10 had the flu at one time?
  
• A convex pentagon has interior angles with measures (5x-12), (2x+100), (4x+16), (6x+15), and (3x+41). What is x?
  
• 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
  
• How many ways? can 4 person is throwing a dice. Make a sum of 6
  
• 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? ​
  
• This question 16 could you please help me?
  
• Can anyone help me with answering this question?
  
• How do you simplify #(x^2 + 5x + 4 )/ (x^2 - 16)#?
  
• What is the slope of the line perpendicular to 3x+y=15?
  
• For five tables of 4m length and 3m breadth are to be fitted with a border tape.Find the length of the border tape?
  
• Find the centre of rotation?
  
• Does x^3 has? 3 solutions and x^4 has 4 solutions always?
  
• Is a rectangle a polygon?
  
• How many different ways can the letters “different” be arranged?
  
• Suppose the probability of rain tommorw is 80%. what are the odds of rain tommorrow?
  
• The coach says that the probility of winning the next game is 40%. what are the odds that team will win?
  
• 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
  
• F is a transfomation of R^3 to #R^3# so that f(x,y,z)=(x-y,x+y,z-x) How can i find the standart matrix of this transformation and how can i find the inverse of this transformation? I am not sure how to approach this problem
  
• 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?
  
• Translate 5x+7>2 into a verbal sentence?
  
• 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?
  
• How do you find the inflection points of #y=3x+root(5)((x+2)^3)#?
  
• A circle has a radius of 17 feet. find the radian measure of the central angle that intercepts an arc of length16 feet?
  
• #int (1)/(sqrt(4x^2-9))dx=#?
  
• How would I start this?
  
• In a 30-60-90 triangle, the long leg is _____ the short leg?
  
• Guadalupe and Taylor travel away from the same cafe at the same time, in opposite directions. Taylor travels 8mph faster than Guadalupe. After 7 hours, the two are 196 miles apart. How fast is each of them travelling?
  
• A brand new music system is worth $18,000 in 2001. If the music system's value decreases by 6% every year, what will its value be in 2003?
  
• Joshua is solving the following equation for #x#, but he makes a mistake. What is his mistake in the following work?
  
• Please help?
  
• What is the square root of ax^2+bx+c?
  
• Find every way that the team can toss the coin during the week and scrimmage first only twice?
  
• What is the standard form of a quadratic function with a vertex of (-2,-3) and passing through the point (-4,-1)?
  
• Please Answer?
  
• Can anyone help ? Show that the pair of triangles is congruent. Then find the missing measures in the diagram.
  
• Can anyone help me ?
  
• A dice is thrown 2times. What will be the probability of getting 11?
  
• What is the length of EF⎯⎯⎯⎯⎯?
  
• The equation x^5-3x^3+x^2-4=0 has one positive root. Verify by calculation that this root lies between 1 and 2. Can someone please solve this question?
  
• How should I do this question that is in the image below?50
  
• 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?
  
• Are the outcomes of a dice roll an example of a discrete or a continuous variable?
  
• Jason wants to buy a $9000 car. He agrees to make a down payment of 20%, and make monthly payments of $201.50 for 60 months. How much will he spend on the car in total?
  
• What is #10 -: 0.25#?
  
• Finding the value of constant k as x approaches infinity?
  
• What's the difference between the population mean of a variable, the distribution of sample means of a variable, and the mean of a variable?
  
• A fair coin is tossed 10 times. What is the probability of observing exactly 8 heads?
  
• Which of the following pairs are equivalent expressions?
  
• If #int_1^3 \ f(x) \ dx = 5# and #int_3^8 \ f(x) \ dx = 10#, what is # int_1^8 \ f(x) \ dx #?
  
• ????The domain of a function ƒ(x) is {xϵℝ/-1<x<5} a)Determine the domain of ƒ(x+5) b)Determine the domain of ƒ(-2x+5)
  
• The mean of 8, 7, 5, 9, 4, 3, and #k+4# is 6. What is #k#?
  
• The mean of 8, 7, 5, 9, 4, 3, and #k+4# is 6. What is #k#?
  
• 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 ?
  
• How to simplify #x/(1/x+1/y)#?
  
• Kindly explain this thoroughly ?
  
• Joint probability- mean and variance? Pl refer image attached
  
• Two 6-sided dice are rolled. What is the probability that their results differ by 1?
  
• Conditional probability using two-way tables?
  
• Find #k# such that #"P"(-k<Z<k)=0.95#?
  
• 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.
  
• How do I find #z# for a given confidence level #alpha#?
  
• 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. ?
  
• If you roll five dice, what are the odds of rolling five 5's?
  
• The question in the picture below..?
  
• Twice the sum of a number and 6 is 5. What is the number?
  
• How does this question leads to a Bias and please state the direction of the bias?
  
• What is the solution to this system of equations? #{:(y=10+6x),(y=6x):}#
  
• -4/5 x + 2/3 = 1 and 3/4x +2 What is x?
  
• How do you solve easy questions involving both fractions and variables?
  
• Help me answer this question.....? (question in picture below)
  
• 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"]:}#?
  
• 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. ?
  
• 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?
  
• 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?
  
• The probability of an event E not occurring is 0.4. What are the odds in favor of E occurring?
  
• 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.
  
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