In a survey of 823 human resource professionals concerning challenges they faced in the workplace, 329 said that employee retention/turnover was an important challenge and 181 said that employee satisfaction was an important challenge.

Source: Data extracted from R. King, “Companies Want to Know How Do Workers Feel,” Wall Street Journal, October 14, 2015, p. R3.

a. Construct a 95% confidence interval estimate of the population proportion of human resource professionals who believe that employee retention/turnover was an important challenge.

b. Construct a 95% confidence interval estimate of the population proportion of human resource professionals who believe that employee satisfaction was an important challenge.

c. How would a human resource professional use the results of (a) and (b)?