cluster sampling

常见例句

雙語例句

• DESIGN:A stratified randomised cluster-sampling investigation.
  設計：分層隨機整群抽樣調查。
• Method: questionnaire was used to investigate 200 male out -patients in STD clinic selected with cluster-sampling method.
  方法：採用隨機抽樣對目標人群進行問卷調查。
• Methods A survey on prevalence of FD in communities of Shijiu Neighborhood, Rizhao was conducted by using a stratified, randomized cluster-sampling method.
  方法採用隨機分層整群抽樣方法，對日照市石臼街道常住人群進行麪訪式問卷調查。
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