The Management of a Department Store Is Interested in Estimating

Multiple Choice

The management of a department store is interested in estimating the difference between the mean credit purchases of customers using the store's credit card versus those customers using a national major credit card.You are given the following information. ​ At 95% confidence, the margin of error is

A) 1.694.
B) 3.32.
C) 1.96.
D) 15.