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- DESIGN: Clustering stratified random sampling, cross-sectional survey. 设计:整群分层随机抽样,横断面调查。
- Methods A stratified random sampling was conducted among inhabitants with questionnaire and partial health examination in Yunlong district, Xuzhou. 方法采用整群随机抽样方法，通过问卷进行社区居民健康调查，并对部分居民进行体检。
- Methods Totally 41 350 children of Korean, Mongolian, Li, Miao, Puyi, Tung and Tibetan were investigated with stratified random sampling. 方法在朝鲜族、蒙古族、黎族、苗族、布衣族、侗族和藏族的聚集村分层随机抽样调查41350人。
- Methods With a method of stratified random sampling, a questionnaire survey was conducted among 786 students from 8 middle schools in Beijing. 方法采用分层整群抽样方法，对北京市城区8所中学共计786名学生进行问卷调查。
- Methods With stratified random sampling 100 from 1000 township health centers finished their buildings projects,to measure the change of availability with DEA. 方法:采用分层随机抽样方法,从河南省的1000个“乡镇卫生院建设”项目单位中抽取100个为样本,运用数据包络分析(DEA)方法测算项目单位在项目前后的数据包络分析(DEA)有效率变化。
- PARTICIPANTS: The investigation was carried out from March to June 2000. The method of cohort stratified random sampling was adopted and the questionnaire was administered to adolescent students in Chongqing City and Lanzhou City. 对象:本调查于2000-03/06进行,采用整群分层随机抽样的方法,选取重庆市和甘肃省兰州市的青少年学生进行集体施测。
- The research subjects of this study were badminton customers who had membership in the National Taiwan Sports Center, and sampling method used is proportionate stratified random sampling. 抽样方法采分层随机抽样当中的比例分层随机抽样，以国立台湾大学综合体育馆羽球消费者为取样研究对象。
- Stratified random sampling for percentages 百分比的分层随机抽样
- Timates in stratified random sampling 分层随机抽样的比率估计值
- optimum allocation in stratified random sampling 最优分配分层随机抽样
- NORC has selected physician respondents from a stratified random sample of the American Medical Association's Physician Masterfile. NORC在美国医学会医生数据库中随机分层选择应答对象。
- The non-native norming group was a stratified random sample of 514 callers sampled from a larger group of more than 3,500 non-native callers. 非本地的标准测试人群共有514位，他们是从3500多位非本地的电话测试者中分层次地随机挑选出来的。
- stratified random sampling surveys 分层随机抽样调查
- stratified random sampling method 分层随机抽样法
- ratio estimates in stratified random sampling 分层随机抽样的比率估计值
- ratimates in stratified random sampling 分层随机抽样的比率估计值
- Estimation of the Geometric Mean in Stratified Random Sampling 分层抽样中几何平均数的估计
- Proportion allocation in stratified random sampling, 按比例分层随机抽样
- A Study on Sample Size Allocation in Stratified Random Sampling 分层抽样中样本量的分配方法研究
- Methods Stratified chester random sampling. 方法采用分层整群随机抽样的调查方法。
