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# In Exercises, refer to Table, included with the Chapter Problem. In each case, assume

## Problem 20BSC Chapter 4.5

Elementary Statistics | 12th Edition

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Problem 20BSC

In Exercises, refer to Table, included with the Chapter Problem. In each case, assume that 1 of the 1000 test subjects is randomly selected.

False Negative Find the probability of selecting a subject with a negative test result, given that the subject uses drugs. Who would suffer from this type of error?

Table Pre-Employment Drug Screening Results

 Positive Test Result (Drug Use Is Indicated) Negative Test Result (Drug Use Is Not Indicated) Subject Uses Drugs 44 (True Positive) 6 (False Negative) Subject Is Not a Drug User 90 (False Positive) 860 (True Negative)
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