Polygraph tests have an accuracy rate of about 90% meaning apositive will indicate the person is lying.
Question:
Polygraph tests have an accuracy rate of about 90% meaning apositive will indicate the person is lying. A company of 5000employees has everyone submit to a polygraph test. It turns outthere are 50 employees who will lie during theirpolygraph. (Do not use commas.)
Positive test result | Negative test result | Total | |
You are lying | 45 | 5 | 50 |
You were not lying | 4455 | 495 | 4950 |
Total | 4500 | 500 | 5000 |
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Question 32 pts
Using the previous question about the lie detector, answer thefollowing as a percentage with 2 decimalplaces:
If you had a negative test result, what are the chances you wereactually lying?
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Question 42 pts
Using the previous question about the lie detector, answer thefollowing as a percentage:
If you were actually lying, what are the chances you werecaught?
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Question 52 pts
Using the previous question about the lie detector, answer thefollowing question:
How many people out of 5000 had a false positive?
Data Analysis and Decision Making
ISBN: 978-0538476126
4th edition
Authors: Christian Albright, Wayne Winston, Christopher Zappe