cluster sampling 整群抽样 将总体中若干个单位合并为组(群),抽样时直接抽取群,然后对中选群中的所有单位全部实施调查 特点:抽样时只需群的抽样框,可简化工作量;调查对的地点相对集中,节省调查费用,方便调查的实施;缺点是估计的精度较差,代表性较差。 multi-stage sampling 多阶段抽样 先抽取群,但并不是调查群内的所有单位,而
Allen Michelle,Kilpatrick David,Armstrong Mike.Multistage cluster sampling design and optimal sample sizes for estimation of fish discards from commercial trawlers.Fisheries Research. 2002Allen, M., Kilpatrick, D., Armstrong, M., Briggs, R., Course, G., and Perez, N. 2002. Multistage cluster ...
8.3 Sampling techniques The sampling technique governs the strategy to sample the configurations in free space Cfree and the choice of the sampling strategy largely governs the performance of the algorithm. To make it easy to simultaneously understand all techniques and their tradeoffs, the techniques...
3.systematic sampling(系统抽样):首先将总体中各单位按一定顺序排列,根据样本容量要求确定抽选间隔,然后随机确定起点,每隔一定的间隔抽取一个单位的一种抽样方式.4.cluster sampling(整群抽样):总体被分为若干群的子总体,每个子总体都代表整个总体.5.multistage sampling(多阶段抽样):是指在抽取样本时,分为两个及...
Analysis of bivariate dichotomous data from a stratified two-stage cluster sampleclustered attribute dataintraclass correlationmodular estimatestwo stage samplingweighted least squares methodIn the health and social sciences, researchers often encounter categorical data for which complexities come from a nested...
Ensures proportional representation of key subgroups. Increases precision in estimating population parameters. Cons: Requires detailed knowledge of the population’s composition. Can be time-consuming to organize strata. 4. Cluster Sampling Cluster sampling involves dividing the population into clusters, such...
Cluster samplingis designed to address problems of a widespread geographical population. Random sampling from a large population is likely to lead to high costs of access. This can be overcome by dividing the population into clusters, selecting only two or three clusters, and sampling from within ...
Single-stage cluster sampling References Agresti A. (1990)Categorical Data Analysis.John Wiley and Sons, New York. Dodge, Y. (2008).The Concise Encyclopedia of Statistics. Springer. Gonick, L. (1993).The Cartoon Guide to Statistics. HarperPerennial. ...
Define a cluster sample and explain how a cluster sample can lead to bias.Sampling Methods:Since it is often impossible to survey or collect data on every single member of a population, we need to conduct studies on a sample instead. There are a variety of ways to construct...
Cluster Sample Cluster sampling is a form of random sampling. Clusters are defined as different subsets of the larger population. Individual samples within the cluster have similar characteristics. Cluster sampling is commonly used when there are large populations that are spread out, making it expensi...