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provided photo 13) You want to estimate the mean amount of time Internet users spend on Facebook each month. How many Internet users must be

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13) You want to estimate the mean amount of time Internet users spend on Facebook each month. How many Internet users must be surveyed in order to be 95% condent that you sample mean is within 15 minutes of the population mean? Based on results from a prior Nielsen survey, assume that the standard deviation of the population of monthly times spent on Faeebook is 210 minutes. (101m)

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