<PRE><B>Question 922879</B>
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 36 days.
If you must estimate the population mean within 6 days, how many outside salespeople should you sample? Use the 98 percent confidence level. (Round your answer to the next whole number.)
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Formula::
n = [z*s/E]^2
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Ans: n = [ 2.3263*36/6]^2 = 195 when rounded up
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Cheers,
Stan H.
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