Low-fat or low-carb? 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 4.6 kilograms with a sample standard deviation of 7.5 kilograms. A second sample of 76 subjects went on a low-fat diet. Their sample mean weight loss was 2.6 kilograms with a standard deviation of 5.7 kilograms. Part: 0/2 Part 1 of 2 (a) Construct a 90% confidence interval for the difference in mean weight loss between the low-carb and low-fat diets. Let H, denote the mean weight loss for low-carb diet. Use the TI-84 calculator and round the answers to one decimal place. A 90% confidence interval for the difference in mean weight loss between the low-carb and low-fat diets is