(Answered) You need to estimate the mean number of travel days per

Statistics

You need 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 40 days.

If you must estimate the population mean within 6 days, how many salespeople should you sample? Use the 95% confidence level. (Use z Distribution Table.) (Round your answer to the next whole number.)

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