Answered: An article included data from a survey…

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

An article included data from a survey of 2500 hiring managers and human resource profes- sionals. The article noted that many employers are using social networks to screen job applicants and that this practice is becoming more common. Of the 2500 people who participated in the survey, 1500 indicated that they use social networking sites (such as Facebook, MySpace, and LinkedIn) to research job applicants. For the purposes of this exercise, assume that the sample is representative of hiring managers and human resource professionals.

A) Why can this sampling distribution be considered normal?

The problem can be assumed to be normal since np + 30 > 0.The problem can be assumed to be normal since n > 30. The problem can be assumed to be normal since np > 10 and n(1-p) > 10.

B) Construct a 90% confidence interval for the true population proportion of employers who use social networking sites to screen job applicants.
Lower Bound =

Upper Bound =
C) Construct a 95% confidence interval for the true population proportion of employers who use social networking sites to screen job applicants.

Lower Bound =

Upper Bound =

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