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MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
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A certain affects virus 0.8% of the population. A test used to detect the virus in a person is positive
85% of the time if the person has the virus (true positive) and 15% of the time if the
have the virus (false postive). Fill out the remainder of the following table and use it to answer the
two questions below.
person
does not
Infected
Not Infected
Total
Positive Test
Negative Test
Total
800
99,200
100,000
a) Find the probability that a person has the virus given that they have tested positive. Round your
answer to the nearest tenth of a percent and do not include a percent sign.
P(Infected | Positive Test)=
1.
%
b) Find the probability that a person does not have the virus given that they test negative. Round
your answer to the nearest tenth of a percent and do not include a percent sign.
P(Not Infected | Negative Test) =
%
Transcribed Image Text:A certain affects virus 0.8% of the population. A test used to detect the virus in a person is positive 85% of the time if the person has the virus (true positive) and 15% of the time if the have the virus (false postive). Fill out the remainder of the following table and use it to answer the two questions below. person does not Infected Not Infected Total Positive Test Negative Test Total 800 99,200 100,000 a) Find the probability that a person has the virus given that they have tested positive. Round your answer to the nearest tenth of a percent and do not include a percent sign. P(Infected | Positive Test)= 1. % b) Find the probability that a person does not have the virus given that they test negative. Round your answer to the nearest tenth of a percent and do not include a percent sign. P(Not Infected | Negative Test) = %
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