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Question 2 (14 points) a) A random sample of 175 student employees participating in Canada's summer job program were asked how many hours they work per week. The average number of hours spent working by seasonal employees in Canada as a whole is 7.8 hours per day, and the mean for the sample of students in Canada's summer job program is 6 hours per day with a standard deviation of 0.88 hours. Is the difference statistically significant at the 0.05 alpha level? Follow the five-step model of hypothesis testing and state all important decisions. Make sure that you interpret the results in terms of the original research question. (6 points) b) Construct a confidence interval for the sample mean using the information from part A of this question and interpret. How are the results from Part A and Part B of this question related? Do the results in Part B support the conclusions you made in part A? Why or why not? (4 points) c) Suppose the research question was changed to "Do students in the summer jobs program have a significantly lower number of hours worked per day than the seasonal employees as a whole"? How would the test constructed in part A of this question change? Follow the five-step model and state all important decisions. Make sure that you interpret the results in terms of the original research question. (4 points) Question 3 (10 points) a) A researcher selected a random sample of 45 university students who drink alcohol. At the end Jes per