The table below displays results from experiments with polygraph instruments. Find P(subject lied negative test result). Compare this result with the probability of selecting a subject with a negative test result, given that the subject lied. Are P(subject lied negative test result) and P(negative test result subject lied) equal?
Did the Subject Actually Lie?
No (Did Not Lie) Yes (Lied)
Positive test results
13
40
Negative test results
32
P(subject lied negative test result) = 0.220 (Round to three decimal places as needed.)
Find the probability of selecting a subject with a negative test result, given that the subject lied.
P(negative test result | subject lied) - (Round to three decimal places as needed )