Estimate difference between the mean purchases

Reference no: EM1316869

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.

Sample size	64	49
Sample mean	$140	$125
Population standard deviation	$10	$8

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

Reference no: EM1316869

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