Question 922879: 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.)
Number of outside salespeople
If you don't mind, please show your work. I will greatly appreciate it.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! 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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