In order to estimate the mean amount of time computer users spend on the internet each month, how many computer users must be surveyed in order to be 95 % confident that your sample mean is within 12 minutes of the population mean? Assume that the standard deviation of the population of monthly time spent on the internet is 213 min. What is a major obstacle to getting a good estimate of the population mean? Use technology to find the estimated minimum required sample size. The minimum sample size required is 1211 computer users. (Round up to the nearest whole number.) What is a major obstacle to getting a good estimate of the population mean?
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