Your body mass index (BMI) is your weight in kilograms divided by the square of your height in meters. Many online BMI calculators
allow you to enter weight in pounds and height in inches. High BMI is a
common but controversial indicator of overweight or obesity. A study by the
National Center for Health Statistics found that the BMI of American young
men (ages 20–29) is approximately Normal with mean 26.8 and standard
deviation 5.2.
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(a) People with BMI less than 18.5 are often classified as “underweight.”
What percent of men aged 20–29 are underweight by this criterion?
(b) People with BMI over 30 are often classified as “obese.” What percent of
men aged 20–29 are obese by this criterion?