More time on the Internet: A researcher polled a sample of 1092 adults in the year 2010, asking them how many hours per week they spent on the Intern The sample mean was 9.39 with a standard deviation of 13.30. A second sample of 1040 adults was taken in the year 2012. For this sample, the mean was 10.55 with a standard deviation of 14.56. 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 increased between 2010 and 2012? Let , denote the mean number of hours spent on the Internet in 2010. Use the a=0.10 level and the P-value method with the TI-84 calculator. Part 1 of 4 State the appropriate null and alternate hypotheses. H H This is a left-tailed test. Part: 1/4 Part 2 of 4