7. Sample sizeAssume the population is infinite,The travel-to-work time for residents of the 15 largest cities in the United States is reportedin the 2003 Information Please Almanac. Suppose that a preliminary simple randomsample of residents of San Francisco is used to develop a planning value of 6.25 minutesfor the population standard deviation.a. If we want to estimate the population mean travel-to-work time for San Francisco resi-dents with a margin of error of 2 minutes, what sample size should be used? Assume95% confidence.b. If we want to estimate the population mean travel-to-work time for San Francisco resi-dents with a margin of error of 1 minute, what sample size should be used? Assume95% confidence.

Answered: Image /qna-images/answer/e6f13256-c306-41af-a127-934aba4d4f4f.jpg

Answered: a. If we want to estimate the…

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

How large must the sample size be in order to estimate a true proportion to within one percentage point MARGIN OF ERROR within 99 percent confidence
12) Please provide a correct answer with a full method explanation and do not copy and past from other similar questions.
9. What sample size is needed to give a margin of error of 2.5% with a 95% confidence level?
If the sample size is 180 and a sample proportion 0.87, find the margin of error at a 95% confidence level O 0.087 O 0.063 O 0.049 O 0.040 O 0.038 O 0.031
A sample size must be determined for estimating a population mean given that the confidence level is 99% and the desired margin of error is 0.24. The largest value in the population18 is thought to be and the smallest value is thought to be 6 .
3. What is the margin of error? 4. What is meant by the 95% confidence interval of the mean?
For this question, how large of a sample size would be required if we wanted to estimate p to within (0.03) with (95%) confidence? Please provide details
We want to estimate the proportion of cities that have private refuse collectors. We want to estimate the population proportion with a margin of error of 0.10, with a confidence level of 90%, with a prior population proportion of 40%. What is the required sample size?
6. You randomly select and weigh 27 samples of an allergy medication. The sample standard deviation is 1.22 milligrams. Assuming the weights are normally distributed, construct 90% confidence intervals for the population variance and standard deviation. Please interpret your result.
4. A survey of 499 women for the American Orthopedic Foot and Ankle Society revealed that 38% wear flats to work. a. Find 99% confidence interval for the population proportion of women who wear flats to work.
your company has just installed a new computer data entry system and you must determine the new input error rates. Management requires you to report the error rates within 0.5% at a 95 confidence level. What sample size do you need if the population standard deviation is 1.2%.
How large must the sample size be in order to to estimate a true proportion to within one percentage point MARGIN OF ERROR with 90 percent confidence?Group of answer choices

SEE MORE QUESTIONS

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