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one study has reported that the sensitivity of the mammogram as a screening test or detecting breast cancer is 0.88 while the specificity is 0.75.

a. what is the probability of a false negative test results

b. what is the probability of a false positive test result

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MissPhiladelphia
a. the probability of a false negative test results 
This corresponds to
P (false | negative) = P (false) x P (negative)
= (1 - P(true)) (1 - P(positive))
= (1 - 0.75)(1 - 0.88)
= 0.03

b. he probability of a false positive test result
= (1  - 0.75) (0.88)
= 0.22

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