cluster sampling

常見例句

DESIGN:A stratified randomised cluster-sampling investigation.
設(shè)計(jì)：分層隨機(jī)整群抽樣調(diào)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(jī)抽樣對目標(biāo)人群進(jìn)行問卷調(diào)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(jī)分層整群抽樣方法，對日照市石臼街道常住人群進(jìn)行麪訪式問卷調(diào)查。