Question: Refer to the sample data in Table 4-1, which is included with the Chapter Problem. a. How many responses are summarized in the table? b.

Refer to the sample data in Table 4-1, which is included with the Chapter Problem.

a. How many responses are summarized in the table?

b. How many times did the polygraph provide a negative test result?

c. If one of the responses is randomly selected, find the probability that it is a negative test result. (Express the answer as a fraction.)

d. Use the rounding method described in this section to express the answer from part (c) as a decimal.

Table 4-1 Results from Experiments with Polygraph Instruments Did the Subject Actually

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)

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