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Prevalence Questions

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Questions:

1. What was the prevalence of AS use among all male high school seniors who participated in the survey?
2. What was the prevalence of use of oral AS among As users?
3. Among AS users, what is the prevalence of those who believed themselves to be stronger than average?
4. What is the prevalence of those who believed themselves to be stronger than average among AS non-users?
5. What is the prevalence of those who believed themselves to be stronger than average among all male high school seniors participating in the survey?
6. What is the prevalence of male high school seniors in the survey intending to participate in school athletics?
7. What is the prevelence of AS users who acquired their drugs from the black market?
8. Considering that "547 reported past or current use of anabolic steroids", what kind of prevalence (point or period) do we have in this study?

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Solution Summary

The prevalence of AS use among all male high school seniors who participated in the survey is determined.

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(1) What was the prevalence of AS use among all male high school seniors who participated in the survey?

87 (out of 109) schools participated in the survey. Of these schools, 5689 eligible students participated in the survey. Of those students, 547 used AS. The prevalence was 547/5689 = 0.09615 = 9.615%.

(2) What was the prevalence of use of oral AS among AS users?

There were 547 AS users. Of these, 489 used oral AS. The prevalence was 489/547 = 0.89397 = 89.397%.

(3) Among AS users, what is the prevalence of those who believed themselves to be stronger ...

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