Happy workers? A manufacturing company employs 14 project managers, 48 foremen, and 377 laborers. In an effort to keep informed about any possible sources of employee discontent, management wants to conduct job satisfaction interviews with a simple random sample of employees every month.

a) Do you see any danger of bias in the company’s plan?

Explain.

b) How might you select a simple random sample?

c) Why do you think a simple random sample might not provide the best estimate of the parameters the company wants to estimate?

d) Propose a better sampling strategy.

e) Listed below are the last names of the project managers.

Use random numbers to select two people to be interviewed.

Be sure to explain your method carefully.

Barrett Bowman Chen DeLara DeRoos Grigorov Maceli Mulvaney Pagliarulo Rosica Smithson Tadros Williams Yamamoto