PLEASE SHOW ALL WORK AND CALCULATIONS An article included data from a survey of 2857 hiring managers in human resource professionals. The article noted that many employers are using social media to screen job applicants and that this practice is becoming more common. Of the 2857 people who participated in the survey 1300 indicated that they use social networking sites(Such as Facebook, my space, and LinkedIn) to research applicants. For the purpose of this exercise, assume that the sample is representative of hiring managers and human resource professionals. A. Assume that this sample is random\representative of the population, what other assumptions need to be true before we can create a confidence interval? B. Construct a 99% confidence interval for the population of hiring managers and human resource professionals who use social networking sites to research job applicants (round your answers to three decimal places.) C. Draw a conclusion about the 99% confidence interval for P, the proportion of all 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 .03 with 99% confidence. (Round your answer to the nearest whole number.) Hint: what formula do we use if the P estimate is unknown.

PLEASE SHOW ALL WORK AND CALCULATIONS

An article included data from a survey of 2857 hiring managers in human resource professionals. The article noted that many employers are using social media to screen job applicants and that this practice is becoming more common. Of the 2857 people who participated in the survey 1300 indicated that they use social networking sites(Such as Facebook, my space, and LinkedIn) to research applicants. For the purpose of this exercise, assume that the sample is representative of hiring managers and human resource professionals.
A. Assume that this sample is random\representative of the population, what other assumptions need to be true before we can create a confidence interval?
B. Construct a 99% confidence interval for the population of hiring managers and human resource professionals who use social networking sites to research job applicants (round your answers to three decimal places.)
C. Draw a conclusion about the 99% confidence interval for P, the proportion of all 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 .03 with 99% confidence. (Round your answer to the nearest whole number.) Hint: what formula do we use if the P estimate is unknown.