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April 24, 2014

Homework Help: statistic

Posted by mark on Monday, October 24, 2011 at 1:15pm.

Wendy is a randomly chosen member of a large female population, in which 13% are pregnant. Wendy tests positive in a pregnancy test. Pregnancy test correctly identifies pregnancy 91% of the time and correctly identifies non pregnancy 95% of the time. What is the probability that Wendy is pregnant given the positive test result ?

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