A certain virus infects 1 in every 200 people. A detection test is 95.8% effective at detecting the virus. Unfortunately, it has a false positive rate of 4.3%. A friend of yours has just tested positive for the virus. What are the chances they are actually infected with the virus? (Enter the probability as a decimal rounded to four decimal places.)

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
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A certain virus infects 1 in every 200 people. A detection test is 95.8% effective at detecting the virus. Unfortunately, it has a false positive rate
of 4.3%. A friend of yours has just tested positive for the virus. Wwhat are the chances they are actually infected with the virus? (Enter the
probability as a decimal rounded to four decimal places.)
Transcribed Image Text:A certain virus infects 1 in every 200 people. A detection test is 95.8% effective at detecting the virus. Unfortunately, it has a false positive rate of 4.3%. A friend of yours has just tested positive for the virus. Wwhat are the chances they are actually infected with the virus? (Enter the probability as a decimal rounded to four decimal places.)
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