... multistage pump 多级泵 multistage sampling 多阶抽样 multivalent element 多价元素 ...
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多阶段抽样 Multi-stage sampling ; [统计] multiphase sampling ; multiple stage sampling ; Multistage Samlping
多阶抽样方差 variance for multi-stage sampling
多阶抽样的方差估计值 variance estimates for multi-stage sampling
二阶抽样与多阶段抽样 two&multi-stage sampling
多阶系统抽样 multi-stage systematic sampling
多阶系统[等距]抽样 multi-stage systematic sampling
方法采取多阶段抽样，对目标人群进行询问式问卷调查。
Methods a questionnaire was conducted among target population by multistage sampling.
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。
Methods Subjects were collected from community population by stratified multi-stage cluster sampling method. The data gathered from case investigation and serological detection.
方法采用多阶段整群抽样和配额抽样相结合的方法，对深圳市1 320名居民进行入户问卷调查。
Methods Random sample were obtained from the whole population by multiple stratified cluster and 1 320 objects were surveyed in their own homes by questionnaires.
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