You wish to estimate the mean number of travel days per year for salespeople. The mean...

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You wish to estimate the mean number of travel days per year for salespeople. The mean...

You wish to estimate the mean number of travel days per year for salespeople. The mean of a small pilot study was 150 days, with a standard deviation of 36 days.

If you want to estimate the population mean within 7 days, how many salespeople should you sample? Use the 90% confidence level.

math Statistics-And-Probability

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