Definitions for "Sampling error"
When a sample chosen for study does not accurately represent the population from which the sample was taken. See gamete sampling.
the possible deviation in the reported finding of media audience research based on a sample from what might be the actual finding had a complete census been done. Usually reported as "+/- " the reported number.
Sampling error is error in our estimates that occurs because we do not observe every unit in the population.
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The maximum expected difference between a probability sample value and the true value.