1. Let the variable X be someone's disease status X = D then someone has strep throat X = Dc then someone does not have strep throat Let the variable Y be someone's test result Y= + is a positive test indicating the test detected strep throat Y = - is a negative test indicating the test did not detect
1. Let the variable X be someone's disease status X = D then someone has strep throat X = Dc then someone does not have strep throat Let the variable Y be someone's test result Y= + is a positive test indicating the test detected strep throat Y = - is a negative test indicating the test did not detect
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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1. Let the variable X be someone's disease status
- X = D then someone has strep throat
- X = Dc then someone does not have strep throat
Let the variable Y be someone's test result
- Y= + is a positive test indicating the test detected strep throat
- Y = - is a negative test indicating the test did not detect strep throat
| Y=+ | Y=- | |
| X=D | 36 | 17 |
| X=Dc | 13 | 20 |
Calculate the probability someone does not have strep throat if it is known their test came back negative
Round your answer to 4 decimal places.
2. Let the variable X be someone's disease status
- X = D then someone has strep throat
- X = Dc then someone does not have strep throat
Let the variable Y be someone's test result
- Y= + is a positive test indicating the test detected strep throat
- Y = - is a negative test indicating the test did not detect strep throat
| Y=+ | Y=- | |
| X=D | 26 | 22 |
| X=Dc | 12 | 37 |
Calculate the Negative Predictive Value
Round your answer to 4 decimal places.
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