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by rfatnabayeff
4420 days ago
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I can't understand why I'm not getting 2% from my point of view.
A person is identified positive in two distinct cases: if it is ill (p1=0.001) AND the test shows positive (q1=0.95), or when it is clean (p2=0.999) but the test wrongly shows positive (q2=0.05). The probability of this event is P=p1 * q1+p2 * q2=0.001 * 0.95+0.999 * 0.05=0.0509 |
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