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sampling
Also known as random selection, drawing
in statistics and (including qualitative) research, a term for the selection of data points from a larger population
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A visual representation of the sampling process
In statistics, quality assurance, and survey methodology, sampling is the selection of a subset of individuals from within a statistical population to estimate characteristics of the whole population. The subset, called a statistical sample (or sample, for short), is meant to reflect the whole population, and statisticians attempt to collect samples that are representative of the population.