Which of the following is not true about the body mass index?
a. uses statistical data of weight and height across the population
b. measures the percentage of one's body fat directly
c. relies on a correlation between weight and body fat
d. does not account for one's body frame size or muscle content

Body mass index takes into account both weight and height. It does not measures the body fat directly.

Further Explanation:

Body Mass Index (BMI) reflects the ratio of person’s weight in kilograms to the square of height in meters. A high BMI of a person indicates that the person is having high fatness.

The National Institutes of Health (NIH) puts weight into three categories and they are:

1. Normal weight

2. Overweight

3. Obesity

According to the studies done by the National Center for Health, the Statistics includes:

1. BMI values less than 18.5 kg/m² reflects that the individual is underweight.

2. Overweight can be described as the body mass index of 25.0 to less than 30.0 kg/m².People having BMIs in this range possess increased risk of type 2 diabetes.

3. Obesity is defined as a BMI of 30.0 kg/m² or greater. People with BMIs of 30 kg/m² or more possess high cardiovascular diseases risk.

4. BMI values from 18.5 kg/m² to 24.9 kg/m² reflects that the individual ishealthy.

5. Some well-trained people possessing dense muscle mass have high BMI score but little body fat. Their BMI can be measured the waist circumference, the skinfold thickness or more direct.

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Answer Details:

Grade: College Biology

Subject: Health

Chapter: Fitness and health

Keywords:

Body Mass Index (BMI), weight, height, fat, Obesity, National Center for Health, underweight, overweight, body mass, diabetes, cardiovascular diseases, health, waist.

i believe the correct answer is c