抽样方法(常用)

概率抽样方法(Probability Sampling Methods)

• 简单随机抽样(Simple random sample):Every member of a population has an equal chance of being selected to be in the sample.

• 分层抽样(Stratified random sample):Split a population into groups. Randomly select some members from each group to be in the sample.

• 整群抽样(Cluster random sample):Split a population into clusters. Randomly select some of the clusters and include all members from those clusters in the sample.

• 系统抽样(Systematic random sample):Put every member of a population into some order. Choosing a random starting point and select every nth member to be in the sample.

非概率抽样(Non-Probability Sampling Methods)

• 偶遇

• 判断

• 推荐

• 便利