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More time on the Internet: A researcher polled a sample of 1054 adults in the year 2010, asking them how many hours per week they

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More time on the Internet: A researcher polled a sample of 1054 adults in the year 2010, asking them how many hours per week they spent on the Internet. The sample mean was 10.56 with a standard deviation of 14.94. A second sample of 1068 adults was taken in the year 2012. For this sample, the mean was 9.51 with a standard deviation of 13.57. Assume these are simple random samples from populations of adults. Can you conclude that the mean number of hours per week spent on the Internet decreased between 2010 and 2012? Let j denote the mean number of hours spent on the Internet in 2010 and up denote the mean number of hours spent on the Internet in 2012. Use the @= 0.01 level and the P-value method with the table

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