查询词典 stratified sampling
- 与 stratified sampling 相关的网络例句 [注：此内容来源于网络，仅供参考]
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Methods Students from 6 high schools in Hangzhou were selected by stratified sampling.
中学生的学习成绩是社会、学校、家庭关注的主要问题。
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College students were selected as the sample from 182 universities in China according to the principle of stratified sampling.
根据常模组测量的结果，给出了85种生活事件和日常琐事的心理影响指数、心理影响范围和心理影响总量。
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Methods Study subjects were selected through stratified sampling and data were collected through questionnaire and physical examination.
方法］采用分层整群抽样的方法获取研究样本，采用问卷调查和体检相结合的方法收集相关信息。
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Methods Based on stratified sampling, 363 medical facilities were selected to conduct the survey.
采取分层抽样方法在全国范围内抽取363家医疗机构开展调查。
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Methods A self-developed questionnaire was used to investigate 2600 old persons selected in 26 provinces by stratified sampling.
方法在26省按照城乡和男女分层抽样，对2600名老年人进行问卷调查，并对有效的2414份问卷进行数据统计学处理。
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In this paper, 236 SMEs of different types of ownership and from different industries are investigated using a stratified sampling method.
本文采用分层抽样方法，对236家不同所有制、具有行业代表性的中小企业展开了问卷调查。
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Methods 27 species of Acaroid mites were isolated from 19 grain species in 3 groups of grain stocks with the stratified sampling; Two fuzzy matrixes was founded for classification.
方法从 19种粮食中分离出的粉螨经软划分法建立模糊相似矩阵后，采用直接编网分类和带权重αi 编网分类。
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Stratified sampling design is applied in obtaining an accurate representation of the population by grouping the data into nonoverlapping groups, for example gender or income level, then selecting a simple random sample within each group.
分层抽样是将总体分成若干个组分，在每个组分中进行简单随机抽样，其原则在于将类似的样本归在一个组里面。
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A stratified sampling method is used to estimate the cotton field...
设计了满足生产应用的全国作物面积遥感监测抽样运行方法
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Methods a cluster stratified sampling method was used to chose 3 989 pupils from six schools of different levels in xiamen. they were investigated with conners parent symptom questionnaire.
采用整群分层抽样法抽取厦门市6所不同层次的小学一～五年级学生3 989名为调查对象，应用conners量表进行调查，dsm-ⅳ诊断标准确诊。
- 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。