5. (6pts) Refer to the sample data for pre- employment drug screening shown test

Question

5. (6pts) Refer to the sample data for pre- employment drug screening shown test result is a false positive? (False positive means that the device tests positive on a person that is not a drug user) below. If one of the subjects is randomly selec ted, what is the probability that the Pre- Employment Drug Screening Results Positive test result Negative test result Drug Use Is IndicatedDrug Use Is Not Indicated 38 15 Subject Uses Drugs 23 47 Subject Is Not a Drug User P( false positive test result ) =

Explanation / Answer

Total Number of employee = 38 + 23 + 15 + 47 = 123

Number of False positive result = 23

Probability = 23 / 123 = 0.187

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