Question
HIV Testing: In July 2005, the journal Annals of Internal Medicine published a report on the reliability of HIV testing. Results of a large study
HIV Testing: In July 2005, the journal Annals of Internal Medicine published a report on the reliability of HIV testing. Results of a large study suggested that among people with HIV, 99.7% of the tests were (correctly) positive, while for people without HIV, 98.5% of the tests were (correctly) negative. A clinic serving an at-risk population offers free HIV testing, believing that 15% of the patients may actually carry HIV. (Hint: a tree diagram may be helpful)
(.25 pts) What is the probability that a person will test positive for HIV?b) (.25 pts) What is the probability that a person will test negative for HIV?
c) (.5 pts) What is the probability that a person testing negative is truly free of HIV?
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College Algebra Graphs and Models
Authors: Marvin L. Bittinger, Judith A. Beecher, David J. Ellenbogen, Judith A. Penna
5th edition
321845404, 978-0321791009, 321791002, 978-0321783950, 321783956, 978-0321845405
