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# Solved: Pre-Employment Drug Screening. In Exercise, use

ISBN: 9780321836960 18

## Solution for problem 14BSC Chapter 4.4

Elementary Statistics | 12th Edition

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Problem 14BSC

Pre-Employment Drug Screening. In Exercise, use the test results summarized in Table 1, reproduced here. Consider an event to be “unlikely” if its probability is 0.05 or less.

Pre-Employment Drug Screening If 3 of the 1000 test subjects are randomly selected, find the probability that they all had false negative results. Is it unlikely to randomly select 3 subjects and get 3 results that are all false negative results?

a. Assume that the 3 selections are made with replacement.

b. Assume that the 3 selections are made without replacement.

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Solution 13BSC

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