4 Drug Testing Many companies are now testingprospective
Chapter 4, Problem 54(choose chapter or problem)
4 Drug Testing Many companies are now testingprospective employees for drug use. However,opponents claim that this procedure is unfair becausethe tests themselves are not 100% reliable. Suppose acompany uses a test that is 98% accuratethat is, itcorrectly identifies a person as a drug user or nonuserwith probability .98and to reduce the chance oferror, each job applicant is required to take two tests.If the outcomes of the two tests on the same person areindependent events, what are the probabilities of theseevents?a. A nonuser fails both tests.b. A drug user is detected (i.e., he or she fails at leastone test).c. A drug user passes both tests.
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