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

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

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 48 days.

If you must estimate the population mean within 12 days, how many salespeople should you sample? Use the 98% confidence level. (Use z Distribution Table.) (Round your answer to the next whole number.)

math Statistics-And-Probability

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