Question: Suppose that a polygraph is 90% accurate (it will correctly detect 90% of people who are lying and it will correctly detect 90% of people

Suppose that a polygraph is 90% accurate (it will correctly detect 90% of people who are lying and it will correctly detect 90% of people who are telling the truth). The 2,010 employees of a company are given a polygraph test during which they are asked whether they use drugs. Assume that anyone whom the polygraph operator finds untruthful is accused of lying. Complete parts (a) and (b).

Users

Nonusers

Total

Test finds employee lying

1818

199199

217217

Test finds employee truthful

1 comma 7911,791

1 comma 7931,793

Total

2020

1 comma 9901,990

2 comma 0102,010

a. How many employees are accused of lying?

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