Does this diet help?A group of 70 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 45

people went on the diet but didn't exercise. After six months, their mean weight loss was 16

pounds, with a sample standard deviation of 8

pounds.

Construct a 95% confidence interval for the mean difference in weight losses. Let 1

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 95% confidence interval for the mean difference in weight loss, in pounds, is <<12 .