(a)
To Calculate: the percent of healthy young adults have osteoporosis by the WHO criterion.
(a)

Answer to Problem 31E
0.62%
Explanation of Solution
Given:
The WHO criterion is a BMD score that is 2.5 and the standard deviations below the
The population distribution is approximately normal.
Calculation:
2.5 standard deviations below the mean is equivalent with the z-score being equal to -2.5.
The corresponding
Therefore 0.62% of the healthy young adults have osteoporosis by the WHO criterion.
(b)
To Calculate: the percent of this older population has osteoporosis.
(b)

Answer to Problem 31E
30.85%
Explanation of Solution
Given:
Population is a
Calculation:
The z-score is
The corresponding probability
Therefore
Chapter 7 Solutions
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