Posted by **Jasmine** on Sunday, March 25, 2012 at 2:31am.

A study is being planned to estimate the mean number of semester hours taken by students at a college. The population standard deviation is assumed to be o=4.7 hours. How many students should be included in the sample to be 99% confident that the sample mean is within one semester hour of the population mean u for all students at this college?

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