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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.

	Store's Card	Major Credit Card
Sample size	64	49
Sample mean	$140	$125
Population standard deviation	$10	$8

At 95% confidence, the margin of error is:

A. 1.694

B. 3.32

C. 1.96

D. 15

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Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M9164942

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