Get solution: Sample Size. In Exercises 2532, find the sample size required to estimate

Chapter 7, Problem 28

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Sample Size. In Exercises 2532, find the sample size required to estimate the population mean. Facebook Time You want to estimate the mean amount of time Internet users spend on Facebook each month. How many Internet users must besurveyed in order to be 95% confident that your sample mean is within 15 minutes of the population mean? Based on results from a prior Nielsensurvey, assume that the standard deviation of the population of monthly times spent on Facebook is 210 min. What is a major obstacle to getting agood estimate of the population mean?

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