Time on Homework A university dean of students wishes to
Chapter 7, Problem 21(choose chapter or problem)
Time on Homework A university dean of students wishes to estimate the average number of hours students spend doing homework per week. The standard deviation from a previous study is 6.2 hours. How large a sample must be selected if he wants to be 99% confident of finding whether the true mean differs from the sample mean by 1.5 hours?
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