The Management of a Department Store Is Interested to Estimate

Multiple Choice

The management of a department store is interested to estimate the difference in the amount of money spent by female and male shoppers.You are given the following information. A 95 percent confidence interval estimate for the difference between the average purchases of the customers using the two different credit cards is

A) 49 to 64.
B) 11.68 to 18.32.
C) 125 to 140.
D) 8 to 10.