9.14 The article “Career Expert Provides DOs and DON’Ts for Job Seekers on Social Networking” (CareerBuilder

.com, August 19, 2009) included data from a survey of 2667 hiring managers and human resource professionals.

The article noted that many employers are using social networks to screen job applicants and that this practice is becoming more common. Of the 2667 people who participated in the survey, 1200 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. Construct and interpret a 95% confidence interval for the proportion of hiring managers and human resource professionals who use social networking sites to research job applicants. (Hint: See Example 9.4.)