Question 3 - of 6 Step 1 of 2 00:43:45 To determine if his teaching method increases students' learning, a professor administers a pretest to his class at the beginning of the semester and then a posttest at the end of the semester. The results from 10 randomly chosen students are given below. Let Population 1 be the Pretest scores and Population 2 be the Posttest scores. Test Scores Pretest Posttest 54 57 52 61 88 80 79 64 68 55 91 91 70 60 74 50 94 79 85 83Step 1 of 2: Construct a 90 % confidence interval for the true mean difference between the scores to determine if the teaching method increases students' knowledge of the course material. Round the endpoints of the interval to one decimal place, if necessary. Answer 4 Points Keypad Keyboard Shortcuts Lower Endpoint = Upper Endpoint =