Method Using stratified random sampling method.
方法采用分层随机抽样方法。
Methods Stratified random sampling was adopted to investigate 2588 doctors and nurses in August, 2008.
方法2008年8月采用分层随机抽样方法，对2 588名医护人员进行调查。
Methods: Totally 1000 nurses were investigated with a self designed questionnaire using stratified random sampling.
方法：采用分层随机抽样的方法，自行设计问卷，对1000名临床护理人员进行调查。
Method Some food processing employees were selected according to stratified random sampling method, and filled in a unified questionnaire anonymously.
方法按照分层随机抽样原则随机抽取部分食品从业人员，匿名独自填写统一的调查问卷。
The paper proposes new separate ratio estimators for population mean using known skewness coefficient of auxiliary variable in stratified random sampling.
本文在分层随机抽样下通过使用辅助变量的偏斜系数提出了几个总体均值的估计。
Methods By using stratified random sampling method 524 college students were selected and surveyed with scales about sense of alienation and subjective well-being.
方法分层随机抽取某高校524名大学生，采用疏离感和主观幸福感量表进行施测。
Methods With the method of cluster stratified random sampling, a questionnaire survey was conducted in medical and non-medical higher-educated school in Jilin city.
方法采用整群分层随机抽样的方法，对吉林市某医学院校及非医学高校的在校大学生进行问卷调查。
The 460 subjects are selected from different grades and gender of four dalian universities by stratified random sampling, and screen out 406 effective questionnaires.
采取分层随机取样方式选取大连4所大学在校生作为研讨对象，抽取不同年级、性别的在校生共460名，最后筛选出有效问卷共406份。
Methods General investigation was adopted to understand the water supply situation in rural areas and stratified random sampling was used to monitor the water quality.
方法按照相关调查表要求，对农村供水情况进行普查，供水水质采用分层随机抽样的方法进行监测。
Methods A total of 310 teachers from 4 middle schools in Huaibei City were selected with stratified random sampling to undergo a survey with teacher job burnout questionnaire(MBI-ES).
方法采用分层随机抽样方法，抽取安徽省淮北市4所中学的310名教师，采用教师职业倦怠量表（MBI-ES）进行调查。
We randomly selected 806 children under 6 years of age from 45 primary anganwadi (childcare) centres in Chandigarh, Punjab, India, that were chosen through multistage stratified random sampling.
在印度旁遮普省昌迪加尔的45所托儿所(anganwadi)中心采用多级分层随机取样法选择了806名6岁以下儿童。
The paper introduces multiple imputation (mi) for missing data in stratified random sampling, and discusses the ordinary method of mi with ignorable nonresponse, and illustrates the essential steps.
介绍分层随机抽样条件下多重插补法处理缺失数据的基本思想，分析可忽略无回答的分层随机抽样建立多重插补的常用方法，并通过实例加以说明。
Methods The migrant workers aged 18~60 in one east city were chosen by stratified random sampling, and surveyed by a questionnaire about knowledge, behavior of AIDS, and blooded to test HIV antibody.
方法采用分层随机抽样的方法，对东部沿海某市18~60岁外来务工人员进行问卷调查，收集艾滋病知识和行为的信息，并采集静脉血进行艾滋病病毒抗体检测。
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。
The survey was completed on the basis of combining stratified sampling and random sampling, collecting 1005 valid samples in total.
调查在分层逐级抽样法与随机抽样法相结合的抽样基础完成，共收集有效样本1005个。
Also the results showed that the Stratified Random ClusterSampling is an adequate sampling method for the genetic variation analysis of yellow cattle population.
同时研究表明，系统随机整群抽样是进行黄牛群体遗传变异分析的最适抽样方法。
The normal value range of indicators about accident proneness were detected according to epidemiological survey results using stratified random cluster sampling in 5 cities.
在5个城市作整群分层随机抽样调查确定与事故倾性有关指标的正常值范围。
Methods in 1999, a cross-sectional study was carried out in a natural population of Beijing, using stratified-random sampling method.
方法1999年在北京市自然人群中采用分层随机抽样的方法进行横断面调查。
Methods: Stratified random cluster sampling method was used to determine the survey sample.
方法：以分层随机整群抽样的方法，确定调查样本。
RESEARCH METHODThe stratified multi-stage cluster random sampling method was used in the survey.
研究方法本研究采用分层整群随机抽样方法进行抽样。
Methods Stratified random group sampling was adopted in survey.
方法采用多级随机抽样法。
This paper introduced several methods about the concrete strength inspection: the sampling method given by the present specification; simple random sampling without replacement; stratified sampling.
具体介绍了砼强度检测抽样的几种方法：现行规程抽样法；简单随机抽样法；分层抽样法。
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。
Stratified sampling can reduce the sampling error associated with simple random samples.
分层抽样可以减少由简单随机抽样造成的抽样误差。
Define and apply techniques for assuring data accuracy and integrity such as random sampling, stratified sampling, sample homogeneity, etc.
定义和应用确保数据准确和完整的技巧，如随机抽样法、分层抽样法、样本同质性等。
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。
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。
Methods Stratified random cluster sampling was applied to conduct the investigation using pre-designed and tested questionnaire.
方法采用分层随机整群抽样方法，对疟史进行问卷调查。
Methods Stratified random cluster sampling was applied to conduct the investigation using pre-designed and tested questionnaire.
方法采用分层随机整群抽样方法，对疟史进行问卷调查。
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