February 23, 2017

Homework Help: statistics

Posted by bob on Sunday, May 23, 2010 at 3:34pm.

To reduce theft, the Meredeth Company screens all its employees with a lie detector test that is known to be correct 90 percent of the time (for both guilty and innocent subjects). George Meredeth decides to fire all employees who fail the test. Suppose 5 percent of the employees are guilty of theft.
a. What proportion of the workers are fired?
b. Of the workers fired, what proportion are actually guilty?
c. Of the workers not fired, what proportion are guilty?
d. What do you think of George’s policy?

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