... multi - stage sampling 多级抽样 multi-stage sampling design 多阶段抽样设计 multi-stage cluster sampling 抽样 ; 多阶集群抽样 ...
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Multi-stage sampling 多阶段抽样 ; 多阶段取样 ; 多级抽样 ; 多阶段抽样法
multi stage sampling 多级抽样法
two&multi-stage sampling 二阶抽样与多阶段抽样
stratified multi-stage sampling 分层多级抽样 ; 分层多阶段抽样
variance for multi-stage sampling 多阶抽样方差
two-stage or multi-stage sampling 两级或多级抽样
variance estimates for multi-stage sampling 多阶抽样的方差估计值
Methods. The survey was conducted according to multi-stage stratified cluster sampling method.
方法：分阶段分层整群随机抽样调查。
Methods A total of 7482 residents aged 15-69 selected in representative 30 counties through multi-stage random sampling from Zhejiang Province were surveyed by using questionnaire.
方法采用多阶段随机抽样的方法，在浙江省有代表性的30个县区，对7482名年龄在15～69岁的居民进行面对面问卷调查。
Methods Subjects were collected from community population by stratified multi-stage cluster sampling method. The data gathered from case investigation and serological detection.
方法对社区人群采用多阶段分层整群随机抽样方法抽取研究对象，进行个案调查和血清学检测。
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