Accidental Sampling

Accidental sampling, also known as grab or opportunity sampling, is a form of non-probability sampling that involves taking a population sample that is close at hand, rather than carefully determined and obtained. For instance, a person who is obtaining opinions for a political poll at a shopping mall by randomly selecting passers-by is using a form of accidental sampling. Accidental samples are not as experimentally sound as using random sampling and random assignment.

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