simple random sampling without replacement

基本解釋

Under simple random sampling scheme without replacement and unknown proportion of population possessing neutral attribute, the optimal allocation of sizes of two sub-samples is given.
對(duì)簡(jiǎn)單隨機(jī)不放回抽樣，在總體非敏感屬性個(gè)體比例未知的情況下，給出了兩個(gè)子樣本容量的最優(yōu)配置。
This paper introduced several methods about the concrete strength inspection: the sampling method given by the present specification; simple random sampling without replacement; stratified sampling .
具體介紹了砼強(qiáng)度檢測(cè)抽樣的幾種方法：現(xiàn)行規(guī)程抽樣法；簡(jiǎn)單隨機(jī)抽樣法；分層抽樣法。