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Construction confidence intervals at the 95% levels for respondents who are Democrat/Lean Democrat and Republican/Lean Republican. Here are the statistics: % Party Democrat/Lean Democrat Republican/Lean Republican n 80% 3,252 1,706 35% 1. What are the point estimates for Democrat/Lean Democrat and Republican/Lean Republican? Party Point Estimate Democrat/Lean Democrat Republican/Lean Republican

Construction confidence intervals at the 95% levels for respondents who are Democrat/Lean Democrat and Republican/Lean Republican. Here are the statistics: % Party Democrat/Lean Democrat Republican/Lean Republican n 80% 3,252 1,706 35% 1. What are the point estimates for Democrat/Lean Democrat and Republican/Lean Republican? Party Point Estimate Democrat/Lean Democrat Republican/Lean Republican

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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Exercise 5: Confidence Intervals for the Population Proportion On May 6, 2021, Pew Research Center published poll results on American's attitudes towards abortion. The report showed that 59% of Americans believe that abortion should be legal all or most cases. Construction confidence intervals at the 95% levels for respondents who are Democrat/Lean Democrat and Republican/Lean Republican. Here are the statistics: Party Democrat/Lean Democrat % 80% 3,252 1,706 Republican/Lean Republican 35% 1. What are the point estimates for Democrat/Lean Democrat and Republican/Lean Republican? Party Point Estimate Democrat/Lean Democrat Republican/Lean Republican What is the appropriate z-value to use when constructing a confidence interval at the 95% confidence level? Use the Area Under the Curve Table and Excel. When using Excel, round your answer to three decimal places passed the decimal point. Confidence Z-value z-Value Level (Table) (Еxcel) Excel Formula 95% (0.95) =ABS(NORM.S.INV(0.025)) 3. Calculate the three confidence intervals using a 95% confidence level. You may do this by hand or with Excel. You must show your work. Your answer must include the Point Estimate, Margin of Error (MoE), Lower Confidence Limit (LCL), and the Upper Confidence Limit (UCL). Excel does not have a Confidence Interval function for proportions. (Show your work. Use Excel.) p(1- p) p±z n 4. What do the confidence intervals you constructed tell you? 5. What would happen to the confidence intervals if you changed the level of confidence? 6. What would happen to the confidence interval if you increase the sample size?
Transcribed Image Text:Exercise 5: Confidence Intervals for the Population Proportion On May 6, 2021, Pew Research Center published poll results on American's attitudes towards abortion. The report showed that 59% of Americans believe that abortion should be legal all or most cases. Construction confidence intervals at the 95% levels for respondents who are Democrat/Lean Democrat and Republican/Lean Republican. Here are the statistics: Party Democrat/Lean Democrat % 80% 3,252 1,706 Republican/Lean Republican 35% 1. What are the point estimates for Democrat/Lean Democrat and Republican/Lean Republican? Party Point Estimate Democrat/Lean Democrat Republican/Lean Republican What is the appropriate z-value to use when constructing a confidence interval at the 95% confidence level? Use the Area Under the Curve Table and Excel. When using Excel, round your answer to three decimal places passed the decimal point. Confidence Z-value z-Value Level (Table) (Еxcel) Excel Formula 95% (0.95) =ABS(NORM.S.INV(0.025)) 3. Calculate the three confidence intervals using a 95% confidence level. You may do this by hand or with Excel. You must show your work. Your answer must include the Point Estimate, Margin of Error (MoE), Lower Confidence Limit (LCL), and the Upper Confidence Limit (UCL). Excel does not have a Confidence Interval function for proportions. (Show your work. Use Excel.) p(1- p) p±z n 4. What do the confidence intervals you constructed tell you? 5. What would happen to the confidence intervals if you changed the level of confidence? 6. What would happen to the confidence interval if you increase the sample size?
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