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4 May, 06:58

Millions of Americans are subjected to drug testing in the workplace. The tests are not always reliable. A false positive rate of 5% is considered to be a conservative estimate. Suppose that there are 20 employees in your company, which tests its workers weekly.

1) What is the probability of no false-positives for this week's test?

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  1. 4 May, 08:06
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    (100% - 5%) * 20 = 19;

    p = 19/20 = 0.95;
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