Statistics Solutions

[See Steps] The body mass index (BMI) measures body size in people by dividing weight (in pounds) by the square of height (in inches) and then multiplying

Question: The body mass index (BMI) measures body size in people by dividing weight (in pounds) by the square of height (in inches) and then multiplying by a factor of 703. A BMI less than 18.5 is defi ned as underweight; between 18.5 to 24.9 is normal; between 25 and 29.9 is overweight; and 30 or more is obese. It is well-established that Americans have become heavier during the last half century. Assume that the positively skewed distribution of BMIs for adult American males has a mean of 28 with a standard deviation of 4.

  1. Would the median BMI score exceed, equal, or be exceeded by the mean BMI score of 28?
  2. What z score defi nes overweight?
  3. What z score defi nes obese ?

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