...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 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。
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。
PARTICIPANTS: Totally 528 students, aged 17 to 20 years old, were recruited from grade one of year 2003 in Southwest University of Science and Technology with stratified sampling method.
对象：调查对象来源于以整群分层方法抽取的2003级在西南科技大学就读的一年级学生528名，年龄17～20岁。
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