7. There is a test for allergy to people, but this test is not always right:...
7. There is a test for allergy to people, but this test is not always right:
For people that really do have the allergy, the test says "yes" 80% of the time
For people that do not have the allergy, the test says "yes" 10% of the time ("false positive")
If 1% of the population have the allergy,
a) what is the probability that the test says "yes"?
b) given the test says "yes" what are the chances that a person really has the allergy?
Homework Answers
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7. There is a test for allergy to people, but this test is not
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