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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发表于 2007-11-7 09:45
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