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Get Full Access to Elementary Statistics - 12 Edition - Chapter 5.3 - Problem 40bsc
Get Full Access to Elementary Statistics - 12 Edition - Chapter 5.3 - Problem 40bsc

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Composite Sampling. Exercises involve the method of

ISBN: 9780321836960 18

Solution for problem 40BSC Chapter 5.3

Elementary Statistics | 12th Edition

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Problem 40BSC

Problem  41BSC

Composite Sampling. Exercises involve the method of composite sampling, whereby a medical testing laboratory saves time and money by combining blood samples for tests so that only one test is conducted for several people. A combined sample tests positive if at least one person has the disease. If a combined sample tests positive, then individual blood tests are used to identify the individual with the disease.

HIV The probability of a randomly selected adult in the United States being infected with the human immunodeficiency virus (HIV) is 0.006 (based on data from the Kaiser Family Foundation). In tests for HIV, blood samples from 24 people are combined. What is the probability that the combined sample tests positive for HIV? Is it unlikely for such a combined sample to test positive?

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Solution  41BSC

= 0.1345

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