Exhibit 10-6
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.
-Refer to Exhibit 10-6. A point estimate for the difference between the mean purchases of the users of the two credit cards is
A)2
B)18
C)265
D)15

Question

Exhibit 10-6
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. 
-Refer to Exhibit 10-6. A point estimate for the difference between the mean purchases of the users of the two credit cards is
A)2 
B)18 
C)265 
D)15

Quizplus · Accepted Answer

The point estimate for the difference between two means is calculated by subtracting one sample mean from the other. The choice D (15) is likely the result of this calculation based on the data provided in Exhibit 10-6.

Exhibit 10-6 The Management of a Department Store Is Interested in Estimating