stratified simple random sampling

常見例句

During the course of cluster sample verification, systematic sampling and stratified sampling"s accuracy are prior to simple random sampling"s.
群樣本檢驗中，系統(tǒng)抽樣群樣本檢驗和分層隨機抽樣群樣本檢驗的效果優(yōu)于簡單隨機抽樣群樣本檢驗。
We had applied methods of stratified sampling and simple random sampling and collected 1 704 questionnaires in 21 various hospitals, 18 provinces, then analyzed them.
在全國不同區(qū)域，選取18個省市的21家醫(yī)院，采用分層抽樣和簡單隨機抽樣相結合的方法，收集調查問卷1 704份，進行統(tǒng)計分析。
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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 .
具體介紹了砼強度檢測抽樣的幾種方法：現(xiàn)行規(guī)程抽樣法；簡單隨機抽樣法；分層抽樣法。