A pollster is going to sample a number of voters in a large city and construct a 98% confidence interval for the proportion who support theincumbent candidate for mayor. Find a sample size so that the margin of error will be no larger than 0.05. Be sure to round up to the next wholenumber.The required sample size isAXOO→E

Given: Confidence level is 98% Margin of error is 0.05 Required: To find the sample size.

Answered: A pollster is going to sample a number…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Nearly one-half of Americans ages 25 to 29 are unmarried. How large a sample is necessary to estimate the true proportion of unmarried Americans in this age group within 2 percentage points with 95% confidence?
If the mean of the following probability distribution is 3.44, what is the variance?
Consider a random sample of 300 students in a university, 75 of them declared that they like playing football. Compute a point estimate of the proportion of all students who would like to play football.
A political candidate has asked you to conduct a poll to determine what percentage of people support her. If the candidate only wants a 3% margin of error at a 98% confidence level, what size of sample is needed? The political candidate will need to sample people.
A political candidate has asked you to conduct a poll to determine what percentage of people support her. If the candidate only wants a 4% margin of error at a 97.5% confidence level, what size of sample is needed? Give your answer in whole people.
A political candidate has asked his/her assistant to conduct a poll to determine the percentage of people in the community that supports him/her. If the candidate wants a 1% margin of error at a 95% confidence level, what size of sample is needed? Be sure to round accordingly.The candidate would need to survey people in the community in order to be within a 1% margin of error at a 95% confidence level.
A political candidate has asked his/her assistant to conduct a poll to determine the percentage of people in the community that supports him/her. If the candidate wants a 3% margin of error at a 95% confidence level, what size of sample is needed? Be sure to round accordingly. The candidate would need to survey people in the community in order to be within a 3% margin of error at a 95% confidence level.
The last poll of 144 voters in Iowa shows that 19% of voters will vote for him in the Iowa Presidential Caucus. What is the 99% confidence interval of his support level in Iowa?
A local cellular phone company wishes to estimate the proportion of Clinton County people who own a cellular phone. A previous study showed the proportion to be about 25%. What is the minimum number of people that should be randomly selected so the cellular company is 95% confident that the estimate is within 5% of the true proportion of cellular phone users?
Five years ago 54% of American families owned stocks or stock funds.the Investment Company Institute sampled 400 American families to estimate that the percent owning stocks or stock funds is decreased or not. And find 210 owns stock . What is the test statistics for your hypothesis test (round to 3 decimals)?
Keisha has over 500 songs on her cell phone. She wants to estimate the proportion of songs that are by female artistes. She takes SRS of 50 songs on her phone and finds that 20 of the songs are by female artistes.Create a 99% confidence interval for the proportion of songs on her phone that are by female artistes.
A congressperson wants to estimate the proportion of people in her district that think she is doing a good job. At least how many people should she poll in order to achieve at most a margin of .03 = 3% at confidence level .95?

Recommended textbooks for you

MATLAB: An Introduction with Applications

Statistics

ISBN:

9781119256830

Author:

Amos Gilat

Publisher:

John Wiley & Sons Inc

Probability and Statistics for Engineering and th…

Statistics

ISBN:

9781305251809

Author:

Jay L. Devore

Publisher:

Cengage Learning

Statistics for The Behavioral Sciences (MindTap C…

Statistics

ISBN:

9781305504912

Author:

Frederick J Gravetter, Larry B. Wallnau

Publisher:

Cengage Learning

MATLAB: An Introduction with Applications

Statistics

ISBN:

9781119256830

Author:

Amos Gilat

Publisher:

John Wiley & Sons Inc

Probability and Statistics for Engineering and th…

Statistics

ISBN:

9781305251809

Author:

Jay L. Devore

Publisher:

Cengage Learning

Statistics for The Behavioral Sciences (MindTap C…

Statistics

ISBN:

9781305504912

Author:

Frederick J Gravetter, Larry B. Wallnau

Publisher:

Cengage Learning

Elementary Statistics: Picturing the World (7th E…

Statistics

ISBN:

9780134683416

Author:

Ron Larson, Betsy Farber

Publisher:

PEARSON

The Basic Practice of Statistics

Statistics

ISBN:

9781319042578

Author:

David S. Moore, William I. Notz, Michael A. Fligner

Publisher:

W. H. Freeman

Introduction to the Practice of Statistics

Statistics

ISBN:

9781319013387

Author:

David S. Moore, George P. McCabe, Bruce A. Craig

Publisher:

W. H. Freeman

SEE MORE TEXTBOOKS

A pollster is going to sample a number of voters in a large city and construct a 98% confidence interval for the proportion who support the incumbent candidate for mayor. Find a sample size so that the margin of error will be no larger than 0.05. Be sure to round up to the next whole number.