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Stuck on this question A researcher wishes to estimate the average number of minutes per day a person spends on the Internet. How large a

Stuck on this question

A researcher wishes to estimate the average number of minutes per day a person spends on the Internet. How large a sample must she select if she wishes to be95

% confident that the population mean is within13 minutes of the sample mean? Assume the population standard deviation is40minutes. Round your final answer up to the next whole number.

The researcher needs a sample of at leasthow manypeople?

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