Internet Viewing 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 be 95% condent that the population mean is Within 9 minutes of the sample mean? Assume the population standard cleVIation lS 42 minutes. Round your final answer up to the next whole number. The researcher needs a sample at at least ' I people. (9 "J |-|-3|