A poll was conducted by a researcher on March 18-19, 2020, in English and Spanish, among a randomnational sample of 118 adults. In the poll, 89 Americans approve of the president's management of thecrisis.Construct a 90% confidence interval for the proportion of the Americans that approve of the president'smanagement of the crisis.i. Point estimate: Select an answerii. Confidence leveliii. Margin of error (if applicable):iv. Confidence interval:(Round Upper and lower bound to at least 3 decimal places.)v. Interpretation: We are% and(Round the answer to 3 decimal places)(Round the answer to 3 decimal places)% confident that the true population proportion is between%. (Please note the "%" symbol after each answer box.)Based on the confidence interval, is it reasonable to believe that the population proportion is greater than77% ? Explain.because Select an answer77%.

Answered: Image /qna-images/answer/d043db04-c1ac-4366-a4fe-a43b20ba291a.jpg

Answered: A poll was conducted by a researcher on…

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 college administrator is interested in determining the proportion of students who receive some sort of financial aid. Instead of examining the records for all students, the administrator randomly draws 120 students and finds that 48 of them are receiving financial aid. Use a 90% confidence interval to estimate the true proportion of students who receive financial aid.
A political researcher takes a survey of 310 randomly selected registered voters in Orlando, and each person was asked who they plan on voting for in the 2024 presidential election. 110 said they plan on voting for Candidate A, 185 said they plan on voting for Candidate B, and 15 were unsure or plan to vote for another candidate. The researcher wants to construct a 95% confidence interval for the proportion of all registered voters in Orlando who plan to vote for Candidate B. What is the point estimate? Round final answer to 3 decimal places.
We randomly sample 218 individuals and find that 97 have a college degree. a.)Construct a 95% confidence interval. b.) Describe our interpretation of the confidence level.
A poll asked adults in a certain country whether immigration was a good thing or a bad thing for the country. Out of 1093 respondents, 448 said it was a good thing. a. What percentage of those taking the poll said immigration was a good thing? b. Check the conditions to determine whether you can apply the CLT to find a confidence interval. c. Find a 95% confidence interval for the proportion who believe immigration is a good thing. a % of those taking the poll said immigration was a good thing (Round to one decimal place as needed.)
In a recent poll of 1,003 people conducted by Ipsos Ipsos (see: https://projects.fivethirtyeight.com/biden-approval-rating/ ), 53% of the respondents disapproved of President Biden. Find a 95% confidence interval for the proportion of all people who disapprove of President Biden. Find a 99% confidence interval for the proportion of all people who disapprove of President Biden. What are the respective margins of errors in parts a) and b) and why are they different?
Researchers wants to determine if low-fat diets or low-carb diets are more effective for weight loss. Suppose 100 people were placed on a low-fat diet and at the end of 3 months the mean weight loss was 10.5 lbs witha standard deviation of 12.5 lbs. There were another 100 people placed on a low-carb diet and at the end of 3 months the mean weight loss was 16.5 lbs with a standard deviation of 10.2 lbs. Does mean weight lossdiffer between the two diets? What are the hypotheses??
Find the sample size needed to determine, with a margin of error of one percent, the percentage of Americans who think North Korea is the greatest foreign threat. Use 90% confidence, and assume about 22% of Americans think that North Korea is the greatest threat.

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