随机抽样

用Excel制作统计随机抽样教学课件

Making Statistic Random Sampling Teaching Courseware with Excel

方法采用SCL-90量表对临床专业本科学生通过随机抽样方法进行调查研究。

Method Using SCL-90 an d random sampling method to measure clinical undergraduate students .

该调查在英格兰和威尔士随机抽样了2,000人。

The survey used a random sample of two thousand people across England and Wales

方法：采用随机抽样法将120例化疗期间或化疗后3d内出现中、重度腹痛者分为2组。

Methods : 120 cases with abdominal pain during or after chemotherapy were randomly divided into 2 groups .

方法应用ELISA和westernblot法对随机抽样的献血者进行HTLV－I感染调查。

Methods ELISA and Western Blot were used to detect the randomized samples of blood donors on HTLV-I .

VFP系统实现单纯随机抽样程序的开发及应用

Development of Single Random Sampling Program with VFP

本文在PPS抽样方案和有效回简单随机抽样方案的情形下构造了这两种估计并精确比较了它们的优劣。

Two kinds of estimators were compared under PPS sampling and simple random sampling with replacement .

通过随机抽样和农户推荐，对西双版纳大卡老寨12户农民的水田采用典型取样法设立48个1m2（1×1m）的样方进行调查并结合现场社会经济状况调查。

Twelve sampling plots of wet-rice field were investigated of twelve households of Daka , Xishuangbanna , Yunnan .

方法：采用随机抽样法，确定实施区和空白对照区，对具有代表性的指标进行卫生统计分析（u检验）。

Methods : By random sample , compared the experiment district and control district , representative indexes were analyzed by health statistic methods ( U test ) .

方法：按国际牙齿美学指数（DAI）调查项目及标准，采用随机抽样方法，对330名12～18岁学生进行测量计算。

Methods : Three hundred and thirty students were investigated according to the standards of the Dental Aesthetic Index ( DAI ) survey .

方法采用分层随机抽样的方法，将调查对象分成7个年龄组，每人采集3ml静脉血进行A和C群流脑抗体检测，并做统计分析。

Methods A stratified and random sampling method was adopted for selection of subjects and all the subjects were divided into seven groups by age .

[方法]用整群随机抽样的方法在苏州市平江区抽取35周岁以上常住人口2万名作为调查对象，数据用非条件logistic回归进行多因素分析。

[ Methods ] 20 thousands residents of over 35 years of age in Pingjiang region were randomly cluster sampled and investigated . Data were analyzed with non-conditional logistic regression model .

为模拟边坡破坏的运动形态，本文对山西太原钢铁公司峨口铁矿台阶边坡进行了离散单元法（DEM）分析，并采用了节理随机抽样模型。

Distinct Element Method ( DEM ) was applied to the analysis of the Slope at Eko Open-pit Mine on basis of a stochastic model of rock joints .

方法采用横断面调查设计与分层多阶段随机抽样法获取样本，采用BHemoglobin血红蛋白仪，取指末梢血10μl测量Hb含量。

Methods Cross-sectional study and randomly sampling were used . Blood was collected on tip of finger and the level of hemoglobin was measured using B-Hemoglobin photometer .

为了解山东省糖尿病（DM）患病情况，以分层整群随机抽样方法对20228人进行了调查。

To understand the prevalence and the epidemic characteristics of diabetes mellitus ( DM ) in Shandong Province , 20228 subjects were selected by stratified random cluster sampling and studied .

尽管各种基于随机抽样的数字模拟方法（如MonteCarlo模拟、子集模拟、线抽样等）可以求解此类问题，但计算效率不高。

Despite the numerical simulation methods ( such as Monte Carlo simulation , subset simulation and line sampling etc. ) can solve this problem , but their computational efficiency is quite low .

方法采用定点随机抽样调查方法，对淮南地区部分学生和教职工进行皮肤挑刺试验（SPT）。

Methods Skin prick test ( SPT ) was performed among 2 360 children and staffs selected randomly in Huainan area .

二阶、三阶简单随机抽样时均值函数的jackknife估计

Jackknife Estimation of Functions of Means in Two-stage and Three-stage Simple Random Sampling Multivariate Populations

用条件概率方法研究桩基质量随机抽样不合格桩数r的概率分布p（n，N）（r）和数字特征的计算公式。

In this paper , the conditional probability method is used to derive the formulae of probability distribution and statistic expectation of the number of defective piles in testing the ovens guality of a pile foundation by random sampling without repetition .

方法：在苏州大学一年级、四年级的文理科中按性别比例随机抽样，采用《大学生压抑感调查问卷》进行问卷测试并将采集到的数据输入计算机，进行SPSS统计检验。

Methods : With stratified sampling , 197 the first grade and the forth grade students were surveyed at Suzhou University using Questionnaire for Undergraduate Repression , data were analyzed using SPSS .

作者引入了多维纯生过程，证明了提取全部基元所需随机抽样的总次数服从离散的PH分布，从而它的各阶矩都可用简洁的矩阵形式统一地表出。

In particular , we prove that the total number of random sampling for extracting all primitives has a discrete PH distribution , thus we also give a unified and simple matrix algorithm for computing any moments of the total number .

方法：对学校学生分布调查分析，用多阶段、先整群后简单随机抽样方法从12座民工子弟小学各年级段中随机抽取240名学生，进行IgG抗体测定和调查。

Methods One sample of 240 students was recruited using a multistage cluster sampling design from 12 elementary school of migrant laborers ' children . Measles antibody IgG testing and questionnaire interview were finished .

Grafton采用随机抽样测试，确保含有的DFDBA具有骨诱导性。

Grafton uses a random lot testing to insure that the DFDBA incorporated is osteoinductive .

文中针对草原煤矿城市的特点，提出了基于分类树和BP神经网络的土地覆被环境信息的提取方法，并利用GPS对结果进行了随机抽样验证，证明采用本方法是完全可行的。

In view of characteristics of prairie coal cities , an extraction method of land cover environmental information based on sort tree and BP neural network is put forward in the paper , which is proved to be feasible through testing the results randomly with GPS .

为了提高图像配准的速度，提出了一种基于改进的随机抽样一致性（RANSAC）算法的快速图像配准方法。

In order to improve the speed of image registration , a fast method based on improved RANSAC algorithm is proposed .

提出一种基于随机抽样一致性（RANSAC）的边匹配策略，可以有效剔除误匹配的边，从而提高复杂模型的跟踪稳定性；

Proposing a RANSAC-based edge matching strategy , which can effectively eliminate outliers to make the tracking of complex objects robust ;

利用大豆核心种质随机抽样发掘28K和30K过敏蛋白缺失优异种质

Identification of Gly m BD 28K and Gly m BD 30K lacking soybean by using random sampling of core collection in Soybean

针对直接MonteCarlo法效率较低的问题，在确定粘弹性有限元的基础上，采用拉丁超立方体抽样（LHS）技术进行随机抽样，以提高计算的收敛速度。

Aiming at inefficiency of direct Monte Carlo method , viscoelastic finite element method was determined and Latin hypercube sampling ( LHS ) technique was used for random sampling so as to improve convergent velocity of calculation .

PPS放回抽样方案下对总体均值的估计与简单随机抽样方案下对总体均值的乘积估计是实际应用相当广泛的两种抽样方法。

The estimation for the population mean under PPS sampling scheme and the product estimation for population mean under simple random sampling scheme are two often methods in practice . Their theoretical research is very rich too .

本文在介绍简单随机抽样比估计的基础上，对PPS抽样设计的比估计进行了系统的研究，并使用了第一次农业普查数据对方法进行了模拟。

The paper discusses the ratio estimation with systematic PPS sampling and simulates the model with the data of the First Agricultural Census in China on the base of introduction of the ratio estimation with simple random sampling .