A sampling fraction is a ratio that expresses the size of a sample to the size of the population from which it was drawn. For example, if a sample of 100 individuals is drawn from a population of 1000, the sampling fraction would be 0.1 or 10%. The sampling fraction is important because it helps determine the representativeness of the sample and the accuracy with which the sample reflects the characteristics of the larger population. A larger sampling fraction generally results in a more representative sample, but it can also increase the cost and time required to conduct the study.
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