Question: This is also Exercise 1.17. A randomized experiment was done in which overweight men were randomly assigned to either exercise or go on a diet

This is also Exercise 1.17. A randomized experiment was done in which overweight men were randomly assigned to either exercise or go on a diet for a year. At the end of the study there was a statistically significant difference in average weight loss for the two groups. What additional information would you need in order to determine if the difference in average weight loss had practical importance?

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