A university dean of students wishes to estimate the average number of hours students wish to spend doing homework per week. The standard deviation from a previous study is 6.2 hours. How large a...


A university dean of students wishes to estimate the average number of hours students wish to 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?



Jun 02, 2022
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