Question: A large chain book store wanted to target its customers. They decided to see whether purchases of college graduates differed significantly from those of non-college graduates. The numbers of books purchased yearly by each group are shown below. Assume homogeneity of variances. Samples were randomly selected from the store’s data base.

NUMBER OF BOOKS PURCHASED IN PAST YEAR College Grads Non-College Grads 12 10 20 21 18 12 16 9 22 15 15 16 17 14 21 11 19 16 25 7 20 17 16 8

Select the appropriate statistic and choose an alpha level.

Is your calculated statistic significant; how significant?

Explain your findings in statistical terms, then explain your findings in non-statistical terms to your manager.