Two-stage random sampling 两段随机抽样法 ; 两段随机
multi-stage cluster random sampling 多阶段整群随机抽样
stratified three-stage pps random sampling 分层三阶段pps随机抽样
Methods 1356 employees of 7 enterprises from 7 districts of Shenzhen City were selected by multi-stage random sampling and investigated by questionnaires.
方法采用多层随机抽样方法，抽取深圳市7个区7家企业1356名员工进行健康素养现状调查。
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。
RESEARCH METHODThe stratified multi-stage cluster random sampling method was used in the survey.
研究方法本研究采用分层整群随机抽样方法进行抽样。
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