Optimum Sample Size for a Problem in Choosing the Population with the Largest Mean
选择均值最大总体问题中的最优样本量AI 解读 ↓
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Given k + 1 normal populations, identically distributed with a common known variance σ2 and unknown means, it is required to select N individuals in two stages as follows. In the first stage, n individuals are selected from each of the populations. In the second stage, the remaining N —n(k+1) individuals are selected from the population producing the largest mean in the first stage. A cost unique to the first stage is C(n) = c 0+c 1 na , where C 0, c 1 and α are positive constants. The cost, common to both stages, of choosing an individual from the ith population is c 2(μ0 - μ i ), where c 2 is a positive constant, μ i is the mean of the ith population, and μ0 is the largest of the k +1 means. A minimax solution for the optimum n is obtained and tables give T = n/N for various values of M = (2N)1/2 c 1/(c 2σ).