C8. A social service agency plans to conduct a survey to determine the mean income ofits clients. The director of the agency prefers that you measure the mean income veryaccurately, to within ±$500. From a sample taken 2 years ago, you estimate that thestandard deviation of income for this population is about $5,000. Your job is to figureout the necessary sample size to reduce sampling error to ±$500.a. Do you need to have an estimate of the current mean income to answer thisquestion? Why or why not?b. What sample size should be drawn to meet the director's requirement at the 95%level of confidence? (Hint: Use the formula for a confidence interval and solve for N,the sample size.)c. What sample size should be drawn to meet the director's requirement at the 99%level of confidence?

No, we do not need an estimate of the current mean income as the Margin of error is given which is…

a. Do you need to have an estimate of the current mean income to answer this question? Why or why not? b. What sample size should be drawn to meet the director's requirement at the 95% level of confidence? (Hint: Use the formula for a confidence interval and solve for N, the sample size.) c. What sample size should be drawn to meet the director's requirement at the 99% level of confidence?

a. Do you need to have an estimate of the current mean income to answer this question? Why or why not? b. What sample size should be drawn to meet the director's requirement at the 95% level of confidence? (Hint: Use the formula for a confidence interval and solve for N, the sample size.) c. What sample size should be drawn to meet the director's requirement at the 99% level of confidence?

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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