Question: Students in an introductory economics class are assigned to quiz sections conducted by teaching assistants. For one teaching assistant, the 23 students in the quiz section obtained a mean score of 72.1 on the final examination, and a standard deviation of 11.3. For a second teaching assistant, the 19 students in the section obtained a mean score on the final exam of 73.8, and a standard deviation of 10.6. State all the assumptions needed to find an 80% confidence interval for the difference between the population means. If you were a student in the first class, would you complain about your teaching assistant?