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In order to estimate the difference between the average hourly wages of employees of two branches of a department store, the following data have been gathered.

	Downtown Store	North Mall Store
Sample size	25	20
Sample mean	$9	$8
Sample standard deviation	$2	$1

A 95% interval estimate for the difference between the two population means is:

A. 0.078 to 1.922

B. 1.922 to 2.078

C. 1.09 to 4.078

D. 1.078 to 2.922

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Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M9167214

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