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 PreEmployment 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) 
Solution 20BSC
= 0.12