Answered: A polling organization has been hired…

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 polling organization has been hired to conduct a survey to determine the proportion of people who are likely to support an upcoming ballot initiative. To help determine the size of the sample required for the main poll, a preliminary poll of 20 people is taken that yields the results below. (Yes indicates that the person will support the initiative, No indicates that they won't.)

No Yes No No Yes No No Yes No No No Yes No Yes Yes No No Yes Yes Yes No Yes No No No Yes No No Yes Yes No No No Yes Yes No Yes Yes No Yes

Based on the results of the peliminary poll, how large a sample is required for the main poll, assuming that the main poll should have a margin of error of 3.1% and a confidence level of 96.5%.

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