分层抽样
- 与 分层抽样 相关的网络例句 [注：此内容来源于网络，仅供参考]
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objective to study mental health status among medical students, and to explore the relations between the influencing factors and latent variables to mental health.methodsdescriptive analysis was conducted among 818 medicos, who were sampled by stratified cluster sampling, and the model was established.
目的 了解医学生心理健康状况，探讨医学生心理健康的影响因素及其潜变量之间的关系。方法采用分层整群抽样的方法，对某医科大学818名医学生心理健康状况的一般情况进行描述性分析，并拟合结构方程模型。
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Methods a stratifies cluster sample of three hundred and nineteen students was surveyed in a university in guizhou using an anonymous questionnaire.
采用分层整群抽样抽取贵州某高校大二、大四少数民族大学生319名进行无记名问卷调查。
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The 2001 TEDS Survey employed some multivariate techniques using ecological data from 359 townships in Taiwan for stratification.
本文运用已完成的调查资料透过变异数分析与卡方分析，探讨这一项抽样计画的分层效果。
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Methods Stratified random cluster sampling was applied to conduct the investigation and filter blood spot was collected and examined.
方法采用分层随机整群抽样，开展居民个案调查，同时采集滤纸血滴。
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Copper-bearing IUD is more effective for contraception.
国内关于IUD的报道很多，但主要集中在IUD的有效性、安全性的比较研究及新型IUD的研制上[1] ，大规模IUD使用的流行病学调查相对缺乏，特别是在惰性IUD向活性IUD的转换时期，为此，笔者对四川省近年来IUD使用状况及使用中存在的问题进行了调查。1 对象与方法调查采取分层整群随机抽样方法，将全省
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Methods To adopt multiple phase,stratified random sampling and questionnaire survey,857 donators involved.
采用分层随机抽样的方法，对前来献血的857名献血者进行调查，并对知情人进行访谈。
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METHOD:Stratified randomized sampling method was conducted questionnaire investigation among 668 infant fosterers in Wuyuan and Shanggao County.
采取多阶段分层整群随机抽样，对江西省婺源县、上高县668名婴儿抚养者育儿知识进行问卷调查。
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Methods With multi-stage stratified random cluster sampling, 3835 persons were selected for observation from 145 608 coal mine employees on the list.
采取多阶段分层随机整群抽样方法从某煤矿集团145608名在册员工中抽取3835人为观察对象，进行问卷调查，现场测量血压、身高、体重、腰围及检验血糖、血脂。
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Methods taking whole cluster stratified random simpling method and investigated 2112 school children who aged 6～11 by Achenbach Child Behavior Scale.
应用Achenbach儿童行为量表，采用整群分层随机抽样方法，调查了沿海城市与农村2112名6～11岁儿童。
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Methods: The investigation was made among 5204 persons of 1798 households in 3 city propers of Hebei Province by Cluster and stratified sampling method.
本次调查采用多阶段分层整群抽样的方法，共抽取了全省样本地区3个城区(分别是石家庄市长安区、唐山市路北区、张家口市桥东区)，共调查住户1798户，调查人口5204人。
- 推荐网络例句
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As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.
每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。
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Maybe they'll disappear into a pothole.
也许他们将在壶穴里消失
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But because of its youthful corporate culture—most people are hustled out of the door in their mid-40s—it had no one to send.
但是因为该公司年轻的企业文化——大多数员工在40来岁的时候都被请出公司——一时间没有好的人选。