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A First Course in Probability (10th Edition)
10th Edition
ISBN: 9780134753119
Author: Sheldon Ross
Publisher: PEARSON
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![A laboratory blood test is 99 percent effective in detecting a certain disease when it is, in fact,
present. However, the test also yields a "false positive" result for 1 percent of the healthy
persons tested. (That is, if a healthy person is tested, then, with probability .01, the test result
will imply he or she has the disease.) If .5 percent of the population has the disease, what is the
probability that a person has the disease given that his test result is positive?](https://content.bartleby.com/qna-images/question/4063930d-ae9d-482f-8324-267cbebd3402/e12d8258-60db-4be1-8030-30b0ad922c12/5w57w4a_thumbnail.jpeg)
Transcribed Image Text:A laboratory blood test is 99 percent effective in detecting a certain disease when it is, in fact,
present. However, the test also yields a "false positive" result for 1 percent of the healthy
persons tested. (That is, if a healthy person is tested, then, with probability .01, the test result
will imply he or she has the disease.) If .5 percent of the population has the disease, what is the
probability that a person has the disease given that his test result is positive?
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- Suppose that 35% of people own dogs. If you pick two people at random, what is the probability that they both own a dog?Give your answer as a decimal (to at least 3 places) or fractionarrow_forwardOn the average the traffic pattern at an intersection is as follows: • Twice as many cars go through as the number of vans, bicycles and trucks combined. • Twice as many vans go through as the number of bicycles and trucks combined. • Half as many trucks go through as the number of bicycles. Calculate the probability that the next vehicle to go through is a truck or a car. (19/27)arrow_forward
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