Question 7 20 pts An instructor is interested in whether the time of day of a class affects the student's performance on the same final exam. She takes a random sample of 25 exam scores from a morning class and finds a mean score of 72.6 points, with a standard deviation of 12 points. A random sample of 28 exam scores from an evening class finds a mean score of 74.5 points, with a standard deviation of 6 points. Is there a significant difference in the mean exam score for evening versus morning students? Test the hypothesis using a 0.05 significance level. Show all 4 steps.Question 8 16 pts The pulse rates of a sample of college students were measured before and after drinking a cup of chamomile tea. Results are below. Test the hypothesis that the mean of college student's pulse rate is lower after drinking a cup of chamomile tea, using a significance level of 0.05. Assume a normal distribution, and show all 4 steps of a hypothesis test. Before 87 72 91 77 81 After 86 70 89 80 80