Answered: Determine which type 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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Determine which type of confidence interval is appropriate (if any) in each situation. Type 1: estimate a population mean, population standard deviation is known Type 2: estimate a population mean, population standard deviation is unknown Type 3: estimate of a population proportion If one of the above is appropriate, compute the confidence interval. Answers may be rounded to 3 decimal places. If none of the above are appropriate, state why. The Human Resources Department for Acme Co. is interested in determining the percentage of all employees from the company that have more than one home computer. In a survey of 492 employees, 27% indicated that they own more than one home computer. Develop a 90% confidence interval for the proportion of all Acme Co. employees with more than one home computer.

Expert Solution

Step 1

Given that, n=492 and p=0.27

The 90% confidence interval for the proportion is given as,

$p \pm z_{α / 2} \sqrt{\frac{p (1 - p)}{n}}$

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