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Example 49
Lecture Examples
Example 49: Find the probability of a person having a positive result on a pregnancy test given that they are not pregnant. Then find the probability of a person not being pregnant given that they have a positive pregnancy test. Are these probabilities the same?
Pregnancy Test Results |
|||
|
Positive result |
Negative Result |
|
(Preg. Indicated) |
(Preg. Not Indicated) |
Totals |
|
Subject is pregnant |
80 |
5 |
85 |
Subject is not Pregnant |
3 |
11 |
14 |
Totals |
83 |
16 |
99 |