Cluster Sampling

Description

First, the target population is divided into mutually exclusive and collectively exhaustive sub populations called clusters. Then, a random sample of clusters is selected based on a probability sampling technique such as simple random sampling. For each selected cluster, either all the elements are included in the sample or a sample of elements is drawn probabilistically.

Wikipedia Reference

http://en.wikipedia.org/wiki/Cluster sampling

Covered in Topic(s)

Sampling Design & Procedure