Chapter 14, Problem 28PS

In Problem 14.6 on page 542, you used full-time voluntary turnover $\left(\%\right)$ and total worldwide revenue $\text{(\$billions)}$ to predict the number of full-time job opening (stored in BestCompanies). Using the results from that problem,

a. construct a $\text{95\%}$ confidence interval estimate of the population slope between number of full-time job opening and total worldwide revenue.

b. at the 0.05 level of significance, determine whether each independent variable makes a significant contribution model. On the basis of these results, indicate the independent variables to include in this model.