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- The experiment tested vegetation cover of mosses and vascular plants （lichens were not present） was measured in 1994 and 1995 using a stratified random design. 实验在1994年和1995年用分层随机设计测定了苔藓（不包括地衣）和维管束植物的植被覆盖率。
- DESIGN:A stratified randomized cluster sampling survey. 设计:分层随机整群抽样调查。
- stratified randomized design 分层随机设计
- DESIGN: Clustering stratified random sampling, cross-sectional survey. 设计:整群分层随机抽样,横断面调查。
- 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。
- 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。
- 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。
- Methods Stratified random cluster sampling and multi-factor analysis were used to analyze the risk factors associated with NCD. 方法采用整群随机抽样的调查方法,并应用多因素分析的基本方法筛查危险因素。
- Method Stratified random cluster sampling was used to collect data.The data base was established and statistical analysis was made with SPSS. 方法采用分层整群随机抽样方法收集资料，用SPSS软件建立数据库并进行统计分析。
- 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。
- Methods: The germination percentage was determined by the completely random design of three replications in room temperature. 方法：采用完全随机设计，3次重复，室温条件测试。
- 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。
- Data were analyzed with completely random design analysis of variance, comparisons among groups were performed with LSD test and Dunnett (double side) test. 数据作完全随机设计方差分析,组间比较用LSD检验和Dunnett(双侧)检验。
- 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。
- In this paper, a simple and practical randomized design technique for sensitive question survey is proposed. Further, the estimator of the mean and the variance of this estimator are given. 摘要本文提出一种方便且实用的敏感问题调查策略，并讨论了估计量及其方差以及精度与保护度之间的关系。结果指出精度与保护度之间存在不可调和的矛盾。
- Stratified random in proportion to population 按人口比例分层随机抽样
- 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
