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Suppose that a polygraph is 90% accurate (It will correctly to take 90% of people who are lying and it will correctly to take 90%
Suppose that a polygraph is 90% accurate (It will correctly to take 90% of people who are lying and it will correctly to take 90% of people who are telling the truth). The 1,990 employees of a company are given a polygraph test during which they are asked whether they use drugs. all employees say that they do not use drugs. Assume that anyone home the polygraph operator finds untruthful is accused of lying. Complete parts A and B. Test find employee lying users 18, non-users 197, total 215. test finds employee truthful users 2, non-users 1,775, total 1,775. Total users 20, nonusers 1970, total 1990. What percentage of those found truthful really were truthful? Round to the nearest 10th as needed
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