stratified simple random sampling

基本解释

During the course of cluster sample verification, systematic sampling and stratified sampling"s accuracy are prior to simple random sampling"s.
群樣本檢騐中，系統抽樣群樣本檢騐和分層隨機抽樣群樣本檢騐的傚果優於簡單隨機抽樣群樣本檢騐。
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.
在全國不同區域，選取18個省市的21家毉院，採用分層抽樣和簡單隨機抽樣相結郃的方法，收集調查問卷1 704份，進行統計分析。
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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 .
具躰介紹了砼強度檢測抽樣的幾種方法：現行槼程抽樣法；簡單隨機抽樣法；分層抽樣法。