Question: Example 11.3 (p. 410) described a study that compared mean weight loss for a diet plan to mean weight loss for an exercise plan. In

Example 11.3 (p. 410) described a study that compared mean weight loss for a diet plan to mean weight loss for an exercise plan. In the study, n 5 42 men were put on a diet.

The men who dieted lost an average of 7.2 kg, with a standard deviation of 3.7 kg.

a. Compute the standard error of the mean for the men who dieted. Write a sentence or two to explain what is measured by this value.

b. Compute an approximate 95% confidence interval for the mean weight loss for the men who dieted. Write a sentence that interprets this interval.

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