Refer to Table 4-1.

a. Find P (negative test result | subject did not lie).

b. Find P(subject did not lie | negative test result).

c. Compare the results from parts (a) and (b). Are they equal?

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Table 4-1 Results from Experiments with Polygraph Instruments Did the Subject Actually Lie? No (Did Not Lie) Yes (Lied) Positive test result 15 42 (Polygraph test indicated that the subject lied.) (false positive) (true positive) Negative test result 32 9 (Polygraph test indicated that the subject did not lie.) (true negative) (false negative)