...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 random sampling method [统计] 分层随机抽样法
method of stratified sampling [矿业] 分层取样法 ; 分层抽样法
stratified d sampling method 分层抽样法
stratified cluster sampling method 分层整群抽样方法
adopting stratified random sampling method 采用分层随机抽样方法
METHODS an investigation was made by cluster and stratified sampling method.
方法采用多阶段分层整群抽样方法入户调查。
Stratified sampling method was applied to investigate immunization status of ecdemic children and its affecting factors in Baoshan District.
方法采用分层抽样方法对本区外来流动儿童免疫接种现状及其影响因素进行流行病学调查。
Methods A cluster stratified sampling method was used to choose 3 251 students from 60 classes in 10 middle schools, among which, 3 044 questionnaires were available.
方法按照分层随机整群抽样的方法，抽取蚌埠市10所中学60个班级的3 251名高中生为研究对象，获有效问卷3 044份。
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