The costs associated with conducting interviews for a job opening have skyrocketed over the years. According to a Harris Interactive survey, 211 of 502 senior human resources executives at U.S. companies believe that their hiring managers are interviewing too many people to find qualified candidates for the job (Business Wire, June 8, 2006).
a. Describe the population of interest in this study.
b. Identify the population parameter of interest, p.
c. Is the sample size large enough to provide a reliable estimate of p?
d. Find and interpret an interval estimate for the true proportion of senior human resources executives who believe that their hiring managers interview too many candidates during a job search. Use a confidence level of 98%.
e. If you had constructed a 90% confidence interval, would it be wider or narrower?