Question

Are low-fat diets or low-carb diets more effective for weight loss? A sample of 46 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 6.28 kilograms. A second sample of 49 subjects went on a low-fat diet. Their sample mean weight loss was 2.3 kilograms with a standard deviation of 4.66 kilograms. Can you conclude that the mean weight loss differs between the two diets? Let μ1denote the mean weight lost on the low-carb diet and μ2 denote the mean weight lost on the low-fat diet. Use the =α0.1 level and the TI-84 Plus calculator.

1. state the appropriate null and alternate hypotheses.

Ho:?

H_1: ?

is the hypothesis test a two-tailed, right-tailed or left-tailed?

Answer 1