Body mass index (BMI) is a measure of body fat based on height and weight. According to the document Dietary Guidelines for Americans published by the U.S. Department of Agriculture and the U.S. Department of Health and Human Services, for adults, a BMI of greater than 25 indicates an above healthy weight (i.e., overweight or obese). The BMIs of 75 randomly selected U.S. adults have a mean of 26.0 and a standard deviation of 5.0.

a. Construct a graph similar to Fig. 3.8 on page 118.

b. Apply Chebyshev's rule with k = 2 to make pertinent statements about the observations in the sample.

c. Repeat part (b) with k = 3.