stratified sample
释义
分层抽样：通过将总体分解为由相对均质单元组成的较小部分，并从每个部分中抽取样本来获得的统计样本。
例句
1·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。
2·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。
3·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。
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