An article included data from a survey of 2857 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. survey, 1300 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. Of the 2857 people who participated in the Assuming that this sample is random/representative of the population, what other a. assumptions need to be true before we can create a confidence interval?

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QUESTION 13
An article included data from a survey of 2857 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.
survey, 1300 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.
Of the 2857 people who participated in the
Assuming that this sample is random/representative of the population, what other
а.
assumptions need to be true before we can create a confidence interval?
b.
Construct a 95% confidence interval for the proportion of hiring managers and
human resource professionals who use social networking sites to research job applicants.
(Round your answers to three decimal places.)
Draw a conclusion about the 95% confidence interval for p, the proportion of all
с.
hiring managers and human resource professionals who use social networking sites to research
job applicants
d.
Suppose that the researchers wanted to estimate the proportion of hiring managers
and human resource professionals who screen job applicants using social networks. Determine
the sample size required to estimate the proportion of employers using social networks to
screen job applicants to within .02 with 95% confidence. (Round your answer up to the
nearest whole number.)
Hint: What formula do we use if the p estimate is unknown?
Transcribed Image Text:QUESTION 13 An article included data from a survey of 2857 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. survey, 1300 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. Of the 2857 people who participated in the Assuming that this sample is random/representative of the population, what other а. assumptions need to be true before we can create a confidence interval? b. Construct a 95% confidence interval for the proportion of hiring managers and human resource professionals who use social networking sites to research job applicants. (Round your answers to three decimal places.) Draw a conclusion about the 95% confidence interval for p, the proportion of all с. hiring managers and human resource professionals who use social networking sites to research job applicants d. Suppose that the researchers wanted to estimate the proportion of hiring managers and human resource professionals who screen job applicants using social networks. Determine the sample size required to estimate the proportion of employers using social networks to screen job applicants to within .02 with 95% confidence. (Round your answer up to the nearest whole number.) Hint: What formula do we use if the p estimate is unknown?
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