hi please answer 1 thank you 4. The Department of the Treasury is interested in finding out what proportion of people supportabolishing the penny. Previous research estimated it to be 15%. How large a sample should be surveyed inorder to obtain the result with a 2% margin of error and 95% confidence?5. A researcher is interested in constructing a confidence interval for the number of hours per week atypical person watches TV. Initial results indicate that the standard deviation is s = 7.5 hours.a) How large a sample is required to obtain a 95% confidence interval with a margin of error of 2 hours?b) How large a sample is required to obtain a 95% confidence interval with a margin of error of 1 hour?c) How large a sample is required to obtain a 99% confidence interval with a margin of error of 1 hour?d) Notice that to get smaller error and/or higher confidence, you need a larger sample. This result is anexample of which important Law?

Given that Population proportion p=15%=0.15 Margin of error =E =2%=0.02 95% confidence. NOTE:-…

4. The Department of the Treasury is interested in finding out what proportion of people support abolishing the penny. Previous research estimated it to be 15%. How large a sample should be surveyed in order to obtain the result with a 2% margin of error and 95% confidence?

4. The Department of the Treasury is interested in finding out what proportion of people support abolishing the penny. Previous research estimated it to be 15%. How large a sample should be surveyed in order to obtain the result with a 2% margin of error and 95% 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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Question

hi please answer 1 thank you

4. The Department of the Treasury is interested in finding out what proportion of people support
abolishing the penny. Previous research estimated it to be 15%. How large a sample should be surveyed in
order to obtain the result with a 2% margin of error and 95% confidence?
5. A researcher is interested in constructing a confidence interval for the number of hours per week a
typical person watches TV. Initial results indicate that the standard deviation is s = 7.5 hours.
a) How large a sample is required to obtain a 95% confidence interval with a margin of error of 2 hours?
b) How large a sample is required to obtain a 95% confidence interval with a margin of error of 1 hour?
c) How large a sample is required to obtain a 99% confidence interval with a margin of error of 1 hour?
d) Notice that to get smaller error and/or higher confidence, you need a larger sample. This result is an
example of which important Law?

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