Are low-fat diets or low-carb diets more effective for weight loss? A sample of subjects went on a low-carbohydrate diet for six months. At the end of that time, the sample mean weight loss was kilograms with a sample standard deviation of kilograms. A second sample of subjects went on a low-fat diet. Their sample mean weight loss was kilograms with a standard deviation of kilograms. Can you conclude that the mean weight loss of subjects having low-carb diets is greater than the mean weight loss of subjects having low-fat diets? Let denote the mean weight lost on the low-carb diet and denote the mean weight lost on the low-fat diet. Use the level and the TI-84 Plus calculator.