You need to estimate the mean number of travel days per year for outside salespeople
Chapter 0, Problem 54(choose chapter or problem)
You need to estimate the mean number of travel days per year for outside salespeople. The mean of a small pilot study was 150 days, with a standard deviation of 14 days. If you must estimate the population mean within 2 days, how many outside salespeople should you sample? Use the 90 percent confidence level
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