Stratified cluster random sampling的意思|示意

Methods a questionnaire survey was conducted among the clinical doctors selected by stratified cluster random sampling from grade 1, 2 and 3 hospitals in Guangzhou.

方法采用分层整群随机抽样方法，询问调查抽中的广州市1级、2级和3级医院的一线临床医生。

DESIGN: a stratified random cluster sampling investigation.

设计：分层整群抽样调查。

During the course of cluster sample verification, systematic sampling and stratified sampling "s accuracy are prior to simple random sampling" s.

群样本检验中，系统抽样群样本检验和分层随机抽样群样本检验的效果优于简单随机抽样群样本检验。

Methods Stratified cluster random sampling was carried out in prevalence survey and questionnaires was applied.

方法采取分层整群随机抽样方法进行问卷调查。

Methods: The stratified sampling and cluster random sampling methods are used in this survey.

方法：本研究采用分层随机抽样方法和整群随机抽样方法。

Methods: By using questionnaires with multistage stratified random cluster sampling method, 726 valid questionnaires of 800 were backed from the university students in 4 universities in Dalian city.

对象与方法：研究对象采取分层整群随机抽样的方法，在大连市4所高校大一、大四年级学生中发放问卷800份，收回有效问卷726份。