MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Concept explainers

2-Proportion Test
In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.
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FDA is testing a new drug for its effectiveness in improving lung functions of Covid patients. The drug is considered "effective" and hence approved if it increases the blood oxygen level by an average of 5 points. FDA selected a random sample of 7 individuals and recorded their blood oxygen level before and after taking the drug. The results are in the following table. Person Mike Mina Sophia Ibrahim Silvia Carl George Oxygen level before drug 86 85 94 85 91 88 92 Oxygen level after drug 95 92 97 95 98 98 97 Construct and interpret 95% confidence interval for the difference in oxygen levels before and after the drug use. Based on the interval, do you believe FDA will approve the drug?
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Transcribed Image Text:FDA is testing a new drug for its effectiveness in improving lung functions of Covid patients. The drug is considered "effective" and hence approved if it increases the blood oxygen level by an average of 5 points. FDA selected a random sample of 7 individuals and recorded their blood oxygen level before and after taking the drug. The results are in the following table. Person Mike Mina Sophia Ibrahim Silvia Carl George Oxygen level before drug 86 85 94 85 91 88 92 Oxygen level after drug 95 92 97 95 98 98 97 Construct and interpret 95% confidence interval for the difference in oxygen levels before and after the drug use. Based on the interval, do you believe FDA will approve the drug?
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