Statistics Dictionary

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In statistics, a sample refers to a set of observations drawn from a population.

Often, it is necessary to use samples for research, because it is impractical to study the whole population. For example, suppose we wanted to know the average height of 12-year-old American boys. We could not measure all of the 12-year-old boys in America, but we could measure a sample of boys.

See also:   Populations and Samples | Sampling Theory