Q13. A mutual fund manager wants to create a fund based on a high-grade corporate bond index. She first distinguishers between utility binds and industrial bonds; she then, for each segment, defines maturity intervals of less than 5 years, and greater than 10 yews. 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 to:

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

答案和详解如下：

Q13.  D         Study Session 3-10.b

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

2*3 * 2=12 sampling cells.

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b

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d