22、A mutual fund manager wants to create a fund based on a high-grade corporate bond index. She first distinguishes between utility bonds and industrial bonds; she then, for each segment, defines maturity intervals of less than 5 years, 5 to 10 years, and greater than 10 years. For each segment and maturity level, she classifies the bonds as callable or non-callable. For the manager's sample, which of the following best describes the:

      sampling approach?     number of sampling cells?

A.   Simple random sample 3

B.    Simple random sample 12

C.   Stratified random sample     3

D.   Stratified random sample     12

A. Answer A

B. Answer B

C. Answer C

D. Answer D

答案和详解如下：

22、Correct answer is D

"Sampling and Estimation," Richard A. Defusco, Dennis W. McLeavey, Jerald E. Pinto, and David E. Runkel

2008 Modular Level I, Vol. 1, pp. 422-425

Study Session 3-10-b

distinguish between simple random and stratified random sampling

The mutual fund manager is using a stratified random sampling approach with 12 cells:

2 x 3 x 2 = 12 sampling cells.