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SAT, 11.12.2020 08:10 ahmedislife

The owner of a store would like to estimate the average daily sales by constructing a confidence interval. If he wants to be 95% confident that the sample mean daily sales is within R500 of the
actual mean, what is the minimum number of days that he should include in his sample? Based
on information from similar stores, he assumes that the standard deviation of the daily sales is
R3000.

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