针对序贯概率比检验（SPRT）无法控制抽取样本量等不足之处，提出了一种改进的抽样检验方法——序贯网图检验。
This paper proposed a new sampling plan, the sequential mesh test, in order to overcome the disadvantages of the widely used Sequential Probability Ratio Test (SPRT).
方法 按顺庆城 区娱乐场所分布用等概率随机抽样方法抽中368名暗娼 按“一对一”问卷调查。
Methods According to the distribution of recreation places of Shunqing district, 368 CSW were investigated one-to-one by anonymous questionnaire through equal probability sampling.
证明了在期望值决策准则下，用等概率分层随机抽样得到的方案收益期望值的均值，与用简单随机抽样得到的相同。
It is verified that th action's mean value of the expected value by simple radom sampling is equal to one by stratified radom sampling.
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