More time on the Internet: A researcher polled a sample of 1020 adults in the year 2010, asking them how many hours per week they spent on the Internet. The sample mean was 10.52 with a standard deviation of 14.76. A second sample of 1071 adults was taken in the year 2012. For this sample, the mean was 9.58 with a standard deviation of 13.33. 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 μ 1 denote the mean number of hours spent on the Internet in 2010 and μ2 denote the E a 0.10 level and the P-value method with the table. mean number of hours spent on the Internet in 2012. Use the 2h Part 1 of 6 alo State the appropriate null and alternate hypotheses 0 1 This is right-tailed test. Part 2 of 6 Compute the test statistic. Round the answer to three decimal places. t-1.526 Part: 2/ 6 Part 3 of 6 How many degrees of freedom are there, using the simple method? The degrees of freedom using the simple method is
