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Solved: In Exercises, refer to Table, included with the Chapter Problem. In each case
Chapter 4, Problem 21BSC(choose chapter or problem)
Problem 21BSC
In Exercises, refer to Table, included with the Chapter Problem. In each case, assume that 1 of the 1000 test subjects is randomly selected.
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) |
Inverse Probabilities Find P (subject uses drugs | negative test result). Compare this result to the result found in Exercise. Are P (subject uses drugs | negative test result) and P (negative test result | subject uses drugs) equal?
Exercise
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?
Questions & Answers
QUESTION:
Problem 21BSC
In Exercises, refer to Table, included with the Chapter Problem. In each case, assume that 1 of the 1000 test subjects is randomly selected.
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) |
Inverse Probabilities Find P (subject uses drugs | negative test result). Compare this result to the result found in Exercise. Are P (subject uses drugs | negative test result) and P (negative test result | subject uses drugs) equal?
Exercise
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?
ANSWER: