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Mathematics 14 Online
OpenStudy (anonymous):

A sample consists of all the children that attend two of the five middle schools in the county. What is being used to choose the sample? 1)Convenience 2)Random 3)Cluster 4)Systematic 5)Stratified

OpenStudy (kropot72):

Cluster Sampling is a method where the members of the sample are chosen from one or several groups rather than at random from the whole population.

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