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Issume that you want to construct a 95% confidence interval estimate of a population mean. Find an estimate of the sample size needed to obtain

Issume that you want to construct a 95% confidence interval estimate of a population mean. Find an estimate of the sample size needed to obtain the specified nargin of error for the 95% confidence interval. The sample standard deviation is given. Margin of error, E = 3.3 minutes; sample standard deviation, s= 39.9 minutes The required sample size is____

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