A political candidate feels that she performed particularly well in the most recent debate against her opponent. Hercampaign manager polled a random sample of 400 likely voters before the debate and a random sample of 500likely voters after the debate. The 95% confidence interval for the true difference (post-debate minus pre-debate) inproportions of likely voters who would vote for this candidate was (-0.014, 0.064). What is the margin of error forthis confidence interval?0.064 + (-0.014)2= 0.0250.064 - (-0.014)= 0.03920.064 + (-0.014) = 0.050O 0.064 – (-0.014) = 0.078

We have given that 95% confidence ( -0.014, 0.064) We have to compute margin of error

Answered: A political candidate feels that she…

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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In a recent poll, 430 people were asked if they liked dogs, and 54% said they did. Find the margin of error of this poll, at the 90% confidence level.
A political candidate has asked you to conduct a poll to determine what percentage of people support him. If the candidate only wants a 2% margin of error at a 99% confidence level, what size of sample is needed?
A poll of 1.200 voters asked what the most significant issue was in the upcoming electionSixty-five percent answered the economy. We are interested in the population proportion of voters who feel the economy is the most important. Construct a 90% confidence interval and state the confidence interval and the error bound.
A political candidate has asked you to conduct a poll to determine what percentage of people support her. If the candidate only wants a 9% margin of error at a 90% confidence level, what size of sample is needed?
For a class project, a political science student at a large university wants to estimate the percent of students who are registered voters. He surveys 500 students and finds that 300 are registered voters. Compute a 90% confidence interval for the true percent of students who are registered voters, and interpret the confidence interval. Round your answer to nearest thousandth if necessary. Interpret the result.
CNN is conducting a poll, and wants to produce a 90% confidence interval for the proportion of all New York residents who favor legalizing recreational marijuana. Of the 602 randomly selected New Yorkers surveyed, 394 were in favor of the initiative. a. With 90% confidence, the proportion of New York residents who favor legalizing recreational marijuana is between BLANK and BLANK. b. Suppose that we survey 602 randomly selected Americans many times, and calculate a confidence interval for each group. About Blank . percent of these confidence intervals will contain the true population proportion of New Yorkers who favor legalizing recreational marijuana, and about BLANK percent will not contain the true population proportion.
In a recent poll, 360 people were asked if they liked dogs, and 23% said they did. Find the margin of error of this poll, at the 99% confidence level.
A nationwide poll of 2,525 adults estimated with 95% confidence that the proportion of Americans who support health care reform is 0.78 +/- 0.0162. A member of Congress thinks that 95% confidence isn't enough. He wants to be 99% confident. How would the margin of error of a 99% confidence interval based on the same sample size compare with the 95% interval? O It would be larger, because higher confidence results in a larger margin of error. O It would be the same, because the sample size is the same. O Can't tell, because margin of error depends on the size of the population. O Can't tell, because margin of error varies from sample to sample. O It would be smaller, because higher confidence results in a lower margin of error.
Construct a 95% confidence interval for p1 - p2 for a survey that finds 30% of 240 males and 41% of 200 females are opposed to the death penalty. Group of answer choices a.(-0.200, -0.021) b.(-1.532, 1.342) c.(-1.324, 1.512) d.(-0.561, 0.651)
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