A survey of 300 union members in New YorkState reveals that 112 favor the Republicancandidate for governor. Construct the 98%confidence interval for the proportion of all NewYork State union members who favor theRepublican candidate.O a.0.316 to 0.430O b.0.301 to 0.445O c.0.308 to 0.438O d. 0.304 to 0.442

Given Sample size=300 X=112 At 98% Z is 2.33

Answered: A survey of 300 union members in New…

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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4.2 how large a sample in necessary if we want our estimate to be within 5% of the actual proportion with 99% confidence?
Social Networking Sites In a survey of 2255 randomly selected US adults (age 18 or older), 1787 of them use the Internet regularly. Of the Internet users, 1054 use a social networking site.7 Find and interpret a 95% confidence interval for each of the following proportions: (a) Proportion of US adults who use the Internet regularly. (b) Proportion of US adult Internet users who use a social networking site. (c) Proportion of all US adults who use a social networking site. Use the confidence interval to estimate whether it is plausible that 50% of all US adults use a social networking site.
Out of 300 people sampled, 48 preferred Candidate A. Based on this, estimate what proportion of the voting population prefers Candidate A.Use a 90% confidence level, and give your answers as decimals, to three places.
A survey of 2450 golfers showed that 281 of them are left-handed. Construct a 90% confidence interval for the proportion of golfers that are left-handed. Question 10 options: (0.104, 0.125) (0.369, 0.451) (0.100, 0.130) (0.203, 0.293)
in a public opinion pool 1000 randomly selected persons were asked whether they would vote for candidate x in the next election and 357 replied "yes". the 90% confidence interval for the proportion of the population who would answer "YES" to the same question is?
A random sample of 1,000 voters was drawn and asked on a bipartisan basis about their voting intentions ahead of the recent animal federal election. A total of 610 people said they would vote for the Cat Party. Calculate the 95% confidence interval for the proportion of voters who intend to vote for the Cat Party. Interpret confidence intervals based on this poll and comment on the chances of the Dog Party returning to power.
The following data represent a random sample of five measurements from a normally distributed population: 7,4,2,5,7 a. Find 90% confidence interval for u. b. Find a 99% confidence interval for u.
A random sample of married people were asked "would you remarry your spouse if you were given the opportunity for a second time?"; of the 150 people surveyed, 127 of them said that they would do so. Find the margin of error that corresponds to a 90% confidence interval for the proportion of married people who would remarry their spouse. a) 0.113 b) 0.048 c) 0.029 d) 0.058 e) 0.002
In a random sample of 1000 voters nationwide, 357 are found to support a particular candidate for the presidential elections.A. Find a 98% confidence interval for the fraction of the voting population in favor of the candidate.B. How large a sample is needed if we wish to be at least 95% confident that the sample proportion is within 0.02 of the true fraction of the voting population?
The results of a recent poll on the preference of voters regarding the presidential candidates are shown below. Voters Surveyed Voters Favoring This Candidate Candidate A 200 150 Candidate B 300 195 Find a 95% confidence interval estimate for the difference between the proportions of voters favoring each candidate.
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?

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