1) Simple cluster sampling
简单整群抽样
3) Cluster sampling
整群抽样
1.
Methods Cluster sampling method was used and the results were analyzed for cultivable bacteria in several representative hospitals of Chengde city from May 1998 to May 2000.
方法采取整群抽样方法,对承德市几家有代表性医院从1998年5月至2002年5月的临床细菌培养结果进行统计分析。
2.
Methods 3299 students in Tongcheng middle and elementary schools were sampled by cluster sampling and some common diseases were investigated.
方法 通过整群抽样对桐城市 32 99名中小学生进行健康检查和常见病的监测。
3.
For stratified and cluster sampling with inappreciable differences, estimate precision becomes poor.
对于分层抽样和整群抽样，当群体间的差异、群内个体间差异均不显著时，其估计精度往往都很差。
4) family-based cluster sampling
家庭为单位的整群抽样
1.
In the researches of family-based cluster sampling, the observations of interested variable of the same family members are correlated.
在以家庭为单位的整群抽样调查研究中,由于家庭成员的观测指标间存在一定的内部相关性(intra-family correlation),不符合独立性的假设,若用传统的基于独立性假设的有关方法直接进行分析,即忽略了观察对象在不同家庭的内部相关性,误将其看作独立样本,得到的各参数估计值的有效性和其他统计特性均会受到影响,甚至会给统计推断结论带来偏倚。
5) stratified one-stage cluster sampling
分层单级整群抽样
6) simple random sampling
简单随机抽样
1.
The simple random sampling plan and stratified random sampling plan has been introduced and the application means and effects of which also has been presented,it has some characteristics such as material precision and obvious reduce of sample size,and rational advice has been presented.
介绍了简单随机抽样和分层随机抽样方法及其在检测中的应用方法和效果。
2.
This paper detailed introduced the two sampling methods, simple random sampling, and stratified sampling, and analyzed the features of the two methods.
我国现行既有房屋构件质量评定检测抽样技术存在明显的缺点,本文详细介绍了以数理统计为基础的简单随机抽样和分层随机抽样两种方法,分析了两种方法的特点。
3.
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。
补充资料：整群抽样
分子式：
CAS号：
性质：将总体中各单位划分为若干群，从各群中随机抽取整群样品，例如，调查中学生患近视眼的情况，抽某一个班做统计；进行产品检验；每隔8h抽1h生产的全部产品进行检验等。整群抽样的优点是抽样方法简便，缺点是抽取的样本在总体中分布不均匀，代表性差。
CAS号：
性质：将总体中各单位划分为若干群，从各群中随机抽取整群样品，例如，调查中学生患近视眼的情况，抽某一个班做统计；进行产品检验；每隔8h抽1h生产的全部产品进行检验等。整群抽样的优点是抽样方法简便，缺点是抽取的样本在总体中分布不均匀，代表性差。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条