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Two years ago, a survey of all Wal-Mart customers indicated that the mean number of items bought per day by male customers was 8.3 with a standard deviation of 3.7. You wish to determine whether or not shopping habits among males have changed over the 2-year period.

The following results for the men from a recently selected random sample of customers (in items bought per day): Mean = 7.7, n = 108.

a) Set up H sub 0 and H sub A (null hypothesis and alternative hypothesis).

b) Perform the statistical test (? = .05).

c) Draw final conclusions.

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Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M9379920

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