Area sampling is a form of a cluster sample in which areas (for example, census tracts, blocks) serve as the primary sampling units. The population is divided into mutually exclusive and exhaustive areas using maps, and a random sample of areas is selected.
If all the households in the selected areas are used in the study, it is one-stage area sampling.
If the areas themselves are sub-sampled with respect to households, the procedure is two-stage area sampling.
- ^ American Marketing Association, AMA Dictionary.