PART A:

A marketing research analyst has collected data from a random sample of 100 customers who have purchased a particular "coupon special." The 100 people spent an average of $24.57 in the store with a standard deviation of $6.60. Before performing this sampling the marketing manager claimed that average purchase by those responding to the coupon offer would be at least $25.00. What is the test z value to two places and can the manager's hypothesis (the null hypothesis) be rejected at the 5% significance level?

Question Options:

0.75, reject

-0.75, reject

-1.65, reject

1.65, do not reject

-0.65, do not reject

0.65, do not reject

PARTB:

How many tails are involved in the determination of the critical z value in the marketing research problem?