...precision of simple random sampling : 简单随机抽样精度 stratified simple random sampling : 分层简单随机抽样 SRSWOR (simple random sampling without replacement) : 简单随机不放回抽样，简单随机不重复抽样 ..
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?简单随机抽样
分层简单随机抽样(Stratified simple random sampling) 一种概率抽样方式，总体先分成 层，然后从每层中抽取简单随机样本。
This paper introduced several methods about the concrete strength inspection: the sampling method given by the present specification; simplerandomsampling without replacement; stratified sampling.
具体介绍了砼强度检测抽样的几种方法：现行规程抽样法；简单随机抽样法；分层抽样法。
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Stratifiedsampling can reduce the sampling error associated with simplerandom samples.
分层抽样可以减少由简单随机抽样造成的抽样误差。
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During the course of cluster sample verification, systematic sampling and stratifiedsampling "s accuracy are prior to simplerandom sampling" s.