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Replacement is a term used in two different contexts in surveys. With-replacement sampling refers to methods of sampling in which the unit selected in a particular draw is returned to the finite population and can be selected in other draws. The other context refers to the substitution (replacement) of a sampled unit with another unit as a result of difficulties in contacting or obtaining cooperation. The entry discusses both with-replacement sampling and replacement substitution.

With-Replacement Sampling

One approach to selecting an equal probability sample of n units from a finite population of N units is to draw one unit randomly from the,/V and then independently draw subsequent units until all n are selected. If the selected unit can be sampled more than once, then the method is ...

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