A Group of Individuals Were Selected to Participate in a Diet

Essay

A group of individuals were selected to participate in a diet program. Waist circumferences were collected before and after the program. The question of interest was whether there was a mean change in circumference due to the diet program. A mean change of 2 inches is considered clinically meaningful.

A)The researcher found a mean change of 2.2 inches and wants to conclude that the diet works. Can the researcher make this conclusion? Why or why not? B)Suppose a 95% confidence interval for the mean change was calculated (-1.75, 3.00). Explain to the researcher what this means.