Optimum Sampling in Binomial Populations
二项总体中的最优抽样AI 解读 ↓
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IN choosing the sample size for determining which of two populations has the larger mean, one ordinarily states a difference which is considered worth detecting, and a confidence with which one wishes to detect a difference of this size. Given this information, it is easy to calculate the minimum required sample size. The experimenter, however, must still face the problem of what difference and what confidence coefficient to choose. Actually, these may be considered as functions of the cost of sampling, and the amount and kind of use to be made of the result, i.e., the cost of making an erroneous decision. Assuming we are given two binomial populations, this paper will present a method of giving the required sample size as a simple function of the cost of sampling, the amount of use to be made of the result, and the loss per unit in choosing the wrong population. This sample size minimizes the maximum expected loss over possible values of the population parameters. A discussion of statistical decision theory and in particular of the minimax principle is given in [5]. Some applications are given in [1 ], [2], [4] and [6].