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Assume that you want to construct a95% confidence interval estimate of a population mean. Find an estimate of the sample size needed to obtain the

Assume that you want to construct a95% confidence interval estimate of a population mean. Find an estimate of the sample size needed to obtain the specified margin of error for the95% confidence interval. The sample standard deviation is given.

Margin oferror, E=2.6 minutes; sample standarddeviation, s=56.9 minutes

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