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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
Internet ViewingA 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
90%
confident that the population mean is within
12
minutes of the sample mean? Assume the population standard deviation is
45
minutes. Round your final answer up to the next whole number.
The researcher needs a sample of at least people. |
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