Multistage stratified cluster sampling method was used for the sampling.
采用多阶段整群分层抽样方法。
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 With stratified cluster sampling method, 2 519 students were questionnaired in Anhui province.
方法采用分层整群抽样方法，对安徽省2 519名中小学生进行问卷调查。
Multiple stratified cluster sampling method was used in the Health Service Investigation on residents in Weihai.
利用分层整群抽样的方法对威海市居民进行健康调查。
Methods 3 460 children aged 3 to 6 were enrolled into this study by using a stratified cluster sampling method in Wuhan. Parents of the children were surveyed with a questionnaire.
方法采用分层整群抽样方法抽取武汉市3 460名3~6岁儿童作为研究对象，应用自行设计的儿童睡眠状况问卷对儿童家长进行调查。
Methods: Stratified cluster sampling method was used to choose students to complete "SCL 90 Mental Symptoms Table".
方法：以简明精神症状自评量表(SCL 90)为测试工具，采用分层整群随机抽样研究方法。
Methods The survey of prevalence of dental caries in group aged 12 and 15 years in Anhui province was conducted using the non-proportional, stratified, cluster sampling method.
方法对安徽省四县市的12岁及15岁儿童的龋病发病情况进行抽样调查，采用分层、不等比、多阶段整群抽样的方法。
Methods The questionnaire survey was conducted among 1 700 college students with stratified-cluster sampling method.
方法采用分层整群抽样方法对暨南大学在校学生1 700名进行问卷调查。
Methods The questionnaire survey was conducted among 1 700 college students with stratified-cluster sampling method.
方法采用分层整群抽样方法对暨南大学在校学生1 700名进行问卷调查。
应用推荐