Answered: poll of 1,000 randomly selected…

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 poll of 1,000 randomly selected registered voters was taken and 680 responded that they favor candidate X for mayor (p ₁ = 0.6800). Just before the election, another poll of 900 registered voters was taken and 598 individuals responded that they favor candidate X (p ₂ = 0.6644). A 90% two-proportion z confidence interval for the true difference between p ₁ and p ₂was found to be (-0.0199, 0.0510). What is the meaning of the interval in the context of the problem?

Group of answer choices

There has been no change in support for the candidate.

There has been a substantial drop in support for the candidate.

There has been a substantial gain in support for the candidate.

It is probable for the candidate to get most of the votes because the confidence interval includes zero.

It is not probable for the candidate to get most of the votes because support has dropped below 50%

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