A telephone poll of 500 adult Americans was reported in an issue of Time Magazine. One of the questions asked was “What is the main problem facing the country?” Thirty percent answered “crime”. We are interested in the population proportion of adult Americans who feel that crime is the main problem.Define the random variables X and P’ in words.Which distribution should be used for this problem? Explain your choice.Construct a 97% confidence interval for the population proportion of adult Americans who feel that crime is the main problem. i. State the confidence interval, ii. Sketch the graph, iii. Calculate the error bound4. Suppose we want to lower the sampling error. What is one way to accomplish that?

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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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A telephone poll of 500 adult Americans was reported in an issue of Time Magazine. One of the questions asked was “What is the main problem facing the country?” Thirty percent answered “crime”. We are interested in the population proportion of adult Americans who feel that crime is the main problem.

Define the random variables X and P’ in words.
Which distribution should be used for this problem? Explain your choice.
Construct a 97% confidence interval for the population proportion of adult Americans who feel that crime is the main problem.
i. State the confidence interval, ii. Sketch the graph, iii. Calculate the error bound

4. Suppose we want to lower the sampling error. What is one way to accomplish that?

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