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A survey conducted in year 2021 suggested that 210 out of 300 (70 percent) of university students worked in the summer of 2021. A similar survey is planned for year 2022. Researchers beleve that the 70 percent fraction will remain unchanged. They wish to construct a 90 percent confidence Interval for the difference in proportions and wish to ensure a margin of error at 5 percent. Find the required sample size for the 2022 survey,

A survey conducted in year 2021 suggested that 210 out of 300 (70 percent) of university students worked in the summer of 2021. A similar survey is planned for year 2022. Researchers beleve that the 70 percent fraction will remain unchanged. They wish to construct a 90 percent confidence Interval for the difference in proportions and wish to ensure a margin of error at 5 percent. Find the required sample size for the 2022 survey,

MATLAB: An Introduction with Applications
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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A survey conducted in year 2021 suggested that 210 out of 300 (70 percent) of university students worked in the summer of 2021. A similar survey is planned for year 2022. Researchers believe that the 70 percent fraction will remain unchanged. They wish to construct a 90 percent confidence interval for the difference in proportions and wish to ensure a margin of error at 5 percent. Find the required sample size for the 2022 survey.
Transcribed Image Text:A survey conducted in year 2021 suggested that 210 out of 300 (70 percent) of university students worked in the summer of 2021. A similar survey is planned for year 2022. Researchers believe that the 70 percent fraction will remain unchanged. They wish to construct a 90 percent confidence interval for the difference in proportions and wish to ensure a margin of error at 5 percent. Find the required sample size for the 2022 survey.
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