分层抽样法

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[统计] stratified sampling method
...sampling : 分层系统抽样，分层等距抽样 method of stratified sampling : 分层抽样法，类型抽样法 stratified sampling method : 分层抽样法 ..
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stratified sampling
... 简单随机抽样法 Simple random sampling 分层抽样法 Stratified sampling 群集抽样法 Cluster sampling ...
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method of stratified sampling
stratified systematic sampling : 分层系统抽样，分层等距抽样 method of stratified sampling : 分层抽样法，类型抽样法 stratified probability sampling : 分层概率抽样 ..

短语

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定义和应用确保数据准确和完整的技巧，如随机抽样法、分层抽样法、样本同质性等。
Define and apply techniques for assuring data accuracy and integrity such as random sampling, stratified sampling, sample homogeneity, etc.
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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。
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.
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采取分层抽样法，从青岛某理工院校抽取被试850名，收归有效问卷809份，有效问卷归收率为95.18%。
Stratified sampling method, from a polytechnic school in Qingdao test samples were 850, 809 valid questionnaires were valid for the 95.18 percent response rate.

分层抽样法
分层抽样法也叫类型抽样法。它是从一个可以分成不同子总体（或称为层）的总体中，按规定的比例从不同层中随机抽取样品（个体）的方法。这种方法的优点是，样本的代表性比较好，抽样误差比较小。缺点是抽样手续较简单随机抽样还要繁杂些。定量调查中的分层抽样是一种卓越的概率抽样方式，在调查中经常被使用。

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