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.
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