The extent to which a sample represents a population is critical in determining how easily and validly the researcher can generalize the result back to the entire target population.

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The representativeness of a sample is important because it affects the generalizability of research findings back to the population from which the sample was drawn. A sample that is representative of the population will provide more reliable and accurate results than a sample that is not representative.

The Extent to Which a Sample Represents a Population Is