19. Ateacher wanted to test that if telling students that a test would be curved to the highest grade would help them perform better on quizzes. She gave quizzes to two groups of 5 students each and told one that there would be a curve and the other group was told there would be no curve given. Following are the scores on the quizzes for the two groups: Yes curve: 75, 80, 78, 87, 90 No curve: 76, 83, 72, 80, 70 Run an independent ttest on the data and report the test results using an alpha level of .05. Show ALL work. 20. Run the same data from question 19 (and the same criteria) using a repeated measures ttest. a. Perform the test and report results (show ALL work) b. Explain what the difference in results is due to