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A game. To play a game, you must pay $5 for each play. There is a 10% chance you will win $5, a 40% chance you will win $7, and a 50% chance you will win only $3.
a) What are the mean and standard deviation of your net winnings?
b) You play twice. Assuming the plays are independent events, what are the mean and standard deviation of your total winnings?
How did you think that your sample would compare to the national mean? This is your hypothesis. State either the alternate or null hypothesis and identify which one you are stating.
Suppose it has been determined that the average number of customers waiting for service is 1.929. There are two servers. Determine:
suppose x and y are continuous random variables with joint pdf fx y 24xy 0 lt x 0 lt y and x y lt 1 and zero
Let X and Y be independent random variables with mean j and k and variances m^2 and n^2. Find an expression for the correlation of XY and Y in terms of these means and variances.
Twenty-eight people have been invited to a party. Each invitee meets all other invitees, shaking hands.
Assuming both assertions are correcting and assuming normal distributions, which review book is more likely to result in an SAT gain over 60 points?
The weights of the 100 boys in the Boy Scout Troop 829 are normally distributed with a mean of 170 pounds and a standard deviation of 5 pounds.
a student in a statistics class tossed a die 300 times and obtained the results shown in the table. is the die fair? in
Describe the sampling distribution for the statistic of interest in each of the following stories, including numerical values for the mean and standard.
What is the probability of correctly guess the right code on the first try? What is the probability of not correctly guessing the right code o the first try?
1.p.t. barnum is concerned about the health of his star trapeze artist. if the artist is capable of performing a triple
While exploring data that was collected for an investigation of resources needed for software testing and improvement, you have found an outlier.
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