Mathematics, 30.08.2021 04:50 littledogy13

A diagnostic test for drug use among Olympic athletes based on a blood sample was thought to be excellent. Among drug users, 98% had a positive test. Among nondrug users, 95% had a negative test. Suppose that 1% of the athletes are, indeed, drug users. What proportion of the athletes tested would have a positive test? Of those athletes whose test is positive, what proportion are really drug users?

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A diagnostic test for drug use among Olympic athletes based on a blood sample was thought to be exce...