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Solution: In Exercises, refer to Table, included with the Chapter Problem. In each case

Chapter 4, Problem 23BSC

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QUESTION:

Problem 23BSC

 

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

Positive Predictive Value Find the positive predictive value for the test. That is, find the probability that a subject uses drugs, given that the test yields a positive result.

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)

Questions & Answers

QUESTION:

Problem 23BSC

 

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

Positive Predictive Value Find the positive predictive value for the test. That is, find the probability that a subject uses drugs, given that the test yields a positive result.

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)

ANSWER:

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