5 pts Are low-fat diets or low-carb diets more effective for weight loss? A sample of 78 subjects went on a low-carbohydrate diet for six months. At the end of that time, the sample mean weight loss was 15.0 pounds with a sample standard deviation of 7.77 pounds. A second sample of 74 subjects went on a low-fat diet. Their sample mean weight loss was 16.3 with a standard deviation of 6.10. Can you conclude that the mean weight loss differed between the two diets? Use the a = 0.01 level. i). State the appropriate null and alternate hypotheses. in). Compute the test statistic. ill). How many degrees of freedom are there, using the simple method? IV). Do you reject H.? State a conclusion. (1 H.: u, - u, versus H,: H, - H2 10 - 1.150 IV) No. There is Insufficient evidence to conclude that the mean weight losses differ. O D) Hock, - u. versus Hip, - H2 10) -0.897 1 73 WV) Yes. There appears to be a difference in the mean weight losses. OD Hack, - Ja versus Hep, - 42 - 1.150 lv) No. There is insuthelent evidence to conclude that the mean weight losses differ. 1How. - U versus HA. - 42 Wires. There appears to be a difference in the mean weight losses. 5 pts