Row Labels Count of Right Direction? No 553 Not Sure 70 Yes 384 Grand Total 1007
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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Voter Sentiment. One of the questions Rasmussen Reports included on a 2018 survey of 2,500 likely voters asked if the country is headed in the right direction. Representative data are shown in the file RightDirection. A response of Yes indicates that the respondent does think the country is headed in the right direction. A response of No indicates that the respondent does not think the country is headed in the right direction. Respondents may also give a response of Not Sure.
- What is the point estimate of the proportion of the population of likely voters who do think that the country is headed in the right direction?
- At 95% confidence, what is the margin of error?
- What is the 95% confidence interval for the proportion of likely voters who do think that the country is headed in the right direction?
- What is the 95% confidence interval for the proportion of likely voters who do not think that the country is headed in the right direction?
- Which of the confidence intervals in parts (c) and (d) has the smaller margin of error? Why?
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