Concept information
优选词，正式主题词
Probability.MultistageProbability: Multistage
定义
- Sampling is carried out in stages using smaller and smaller units at each stage, and all stages involve a probability selection. The type of probability sampling procedure may be different at each stage. For example, for a sample of students in a city, schools are randomly selected in the first stage. A random sample of classes within each selected school is drawn in the second stage. Students are then randomly selected from each of these classes in the third stage.
其它语言
URI
http://rdf-vocabulary.ddialliance.org/cv/SamplingProcedure/1.1.4/f91d8ca
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