Is a weight loss program based on exercise less effective than a program based on diet? The 58 overweight people put on a strict one year exercise program lost an average of 21 pounds with a standard deviation of 7 pounds. The 40 overweight people put on a strict one year diet lost an average of 24 pounds with a standard deviation of 10 pounds. What can be concluded at the a = 0.10 level of significance? a. For this study, we should use t-test for the difference between two independent population mea b. The null and alternative hypotheses would be: `Ho: `Ha: M1