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 | 
发表于 2008-11-5 16:26
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