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A department store has determined that 25% of all their sales are credit sales. A random sample of 60 sales is selected.
(Please show full steps and excel formulas)
a) What is the sampling distribution of?
b) What is the probability that the sample proportion will be greater than 0.30?
c) What is the probability that the sample proportion will be between 0.20 to 0.30?
What is the probability both stocks appreciate during the period? What is the probability the bank stock appreciates but the utility does not? What is the probability at least one of the stocks appreciates?
a basketball team at a university is composed of ten players. the team is made up of players who playthe position of
a marketing survey involves product recognition in new york and california. of 558 new yorkers surveyed 193 knew the
two separate samples each with n12 individuals receive two different treatments. after treatment the first sample has
Assume that the result is a sample size beyond what you can obtain. Use the compromise function to compute alpha and beta for a sample half the size. Indicate the resulting alpha and beta. Present an argument that your study is worth doing with the s..
On page 336 of the text we are given a formula to calculate the minimum necessary sample size n. When we do not know the estimates p hat and q hat, we are told to use a value of 0.5 for each of them. Why?
assume that adults have iq scores that are normally distrubuted with a mean of 106 and a standard deviation of 15. find
Listing of types of fund and their returns over a specific number of years. There are four types of funds - describe the data for each fund at the 3-year return
During 2001, 61.3% of US households purchased ground coffee.These households spent an average of $36.16 on ground coffee during the year.
a company is studying the number of monthly absences among its 125 employees. the following probability distribution
1.a study to compare two types of infant formula was run at two sites one in atlanta and the second in denver. the
The manager of a paint supply store wants to determine whether the mean amount of paint conatined in 1- gallon cans purchased from a nationally known manufacturer is actually 1 gallon.
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