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Convenience Sample
Nonprobability sampling is used by researchers to find members of a population pool when this population cannot be enumerated to allow for a probability sample to be constructed. There are four general categories of nonprobability sampling: convenience, quota, purposive, and snowball sampling.
A convenience sample is a selected group from a particular population that is chosen based on their accessibility to the researcher. Examples of convenience samples include selecting neighborhood residents by inviting participants from those entering a supermarket, selecting grade school students from the local elementary school, and selecting undergraduate students from a freshman-level class.
A quota sample is a convenience sample in which the researcher seeks to control some variability in his or her sample. As in a probability sampling—stratified sampling method—a researcher may preselect ...
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