cluster random sampling
短语词组
- cluster systematic random sampling method 束系统随机抽样方法
- Stratified cluster random sampling 分层整群随机抽样
- cluster random sampling method 整群随机抽样方法
- multi -stage random cluster sampling 群抽样
- random cluster sampling 整群抽样
- stratified random cluster sampling 群分层随机抽样
- random and cluster sampling 随机整群抽样 返回 cluster random sampling