Does this diet help? A group of 75 people enrolled in a weight-loss program that involved adhering to a special diet and to a daily exercise program. After six months, their mean weight loss was 26...

Does this diet help? A group of 75 people enrolled in a weight-loss program that involved adhering to a special diet and to a daily exercise program. After six months, their mean weight loss was 26 pounds, with a sample standard deviation of 10

pounds. A second group of 39 people went on the diet but didn't exercise. After six months, their mean weight loss was 12 pounds, with a sample standard deviation of 7

pounds.

Construct a 99.9 % confidence interval for the mean difference in weight losses. Let μ1

denote the mean weight loss of the group with daily exercise. Use the TI-84 Plus calculator and round the answers to the nearest integer.

A 99.9% confidence interval for the mean difference in weight loss, in pounds, is

<>