March 1, 2017

Homework Help: statistics

Posted by bob on Wednesday, March 30, 2011 at 10:13pm.

A university dean wishes to estimate the average number of hours his part-time instructors teach per week. The standard deviation is 2.6 hours. How large a sample must be selected if he wants to be 95% confident of finding whether the true mean differs from the sample mean by 1 hour?

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