28. What are the factors that could help a researcher to increase power in general? EDMS451 TAs are interested in whether watching the violent Red Wedding episode of Game of Thrones before sleep would inuence [not sure bad or good inuence) students' sleeping time. We know that the average sleeping time for people is 7 hours without watching Game of Thrones. Then we randomly selected 25 students and showed them the Red Wedding episode from Game of Thrones before they went to sleep. We recorded their sleep time that night. The sample mean is 6.28 hours and the sample standard deviation is 2. 29. Use appropriate symbols for each of the numbers above: 30. What is the population the TAs are interested in? 31. Write down the null and alternative hypotheses, using both symbols and words. 32. What kind of test should the TAs conduct in order to answer their research question? Is it a one-tail or two-tail test? 33. What are the right steps for the TAs to conduct the test at an a level of 0.05? Perform all steps you think will lead to a correct decision. 34. Based on the decision (reject or retain the null hypothesis) above, how do you interpret the result? Write done the formal sentence like we did in class. 35. Compute the 95% confidence interval for the population mean in question and interpret the condence interval