Question: Suppose a drug test is 82% sensitive and 87% specific. That is, the test will produce 82% true positive results for drug users and 87%

Suppose a drug test is 82% sensitive and 87% specific. That is, the test will produce 82% true positive results for drug users and 87% true negative results for non-drug users. Suppose that 4.8% of people are users of the drug. If a randomly selected individual tests positive, what is the probability he or she is a user?

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