分层取样; 定样

分层抽样；[统计]分层样本

stratified samples───分层样本

stratified random sample───分层随机样本

stratified random samples───分层随机样本

matched sample───相符样品

biased sample───非正型标本；偏置取样；偏性样本

matched samples───匹配的样本

stratified───adj.分层的；形成阶层的；分为不同等级的；v.使成层（stratify的过去分词）

stratifies───vt.分层；成层；使形成阶层；vi.分层；成层；阶层化

striking example───引人注目的例子

Methods a questionnaire survey was conducted to a clustered stratified sample of 1 785 children in Qingdao.───方法采取分层整群抽样的方法对青岛市1 785名儿童进行问卷调查。

Methods: a cluster random stratified sample of 394 medical college students were investigated with a SCL-90 questionnaire.───方法：采取分层整群抽样的方法抽取394名医学生进行SCL - 90症状自评量表的问卷调查。

Methods A cluster stratified sample of 1681 students ham Jianghan University were investigated by SDS.───方法采用分层整群抽样法抽取江汉大学1681名本科学生，采用抑郁自评量表（SDS）进行测评。

Methods A self-designed questionnaire survey was used to investigate a cluster stratified sample of 1010 college students.───方法采用分层整群抽样的方法，对广州市1010名大学生进行问卷调查。

This would be an example of a stratified sample.───这就是一个典型抽样的例子。

Select a sampling method. Do we us a random sample, stratified sample, or cluster sample?───选择一种取样方法，我们是随机抽样、分层抽样、还是整群抽样？

A Stratified Sample Method of Scattering Source for Time-dependent Monte Carlo Transport───非定常粒子输运蒙特卡罗散射源分层抽样方法

SS-MC introduces stratified sample into state-tree search to solve the reliability evaluation of large-scale problems.

Methods A cluster stratified sample of 1681 students ham Jianghan University were investigated by SDS.

Methods A cluster stratified sample of 315 undergraduates were investigated with a closed questionnaire, and 301 questionnaires were available.

Methods A cluster random stratified sample of 404 medical college students were investigated with a self-administered questionnaire.

Quota sampling is like stratified sampling, but with an important variation.

Methods:a cluster random stratified sample of 394 medical college students were investigated with a SCL-90 questionnaire.

This would be an example of a stratified sample.

I used a stratified sample technique in two stages to ensure an adequate representation of singlehanded and group practices.

Methods cluster multi - stratified sample of 1721 undergraduates was investigated with a half - opened questionnaire.