Answered: A research institute poll asked…

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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(4) A research institute poll asked respondents if they felt vulnerable to identity theft. In the poll, n=923 and x=551 who said "yes." Use a 90% confidence level.

A~Find the best point estimate of the population proportion p. answer: 0.597

B~ Identify the value of the margin of error E. E=_____

Expert Solution

Step 1: Point estimate=?

$\mathrm{\small \mathbf{given:}\;x=551,\;n= 923 }$

$\mathrm{\small \mathbf{Sample\;proportion\;(\hat p)}=\frac{x}{n}=\frac{551}{923}=\mathbf{0.597}}$

$\mathbf{{\color{Blue} (A)}}\;\mathbf{Point\;estimate\; for\; population\;proportion,\;p \;=\hat p}=\mathbf{{\color{Red} 0.597}}$

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