February 20, 2017

Homework Help: statistics

Posted by Anonymous on Wednesday, February 11, 2009 at 2:47pm.

In a certain population, 1% of all individuals are carriers of a particular disease. A diagnostic test for this disease has a 90% detection rate for carriers and a 5% detection rate for non- carriers. Suppose that the diagnostic test is applied independently to two different samples from the same randomly selected individual.
a) What is the probability that both test yield the same result?
B) If both tests are positive, what is the probability that the selected individual is a carrier?

i have no idea on where to start.

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