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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A political candidate has asked you to conduct a poll to determine what percentage of people support her.

If the candidate only wants a 5% margin of error at a 95% confidence level, what size of sample is needed?

Give your answer in whole people.

 
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