The only way to know with certainty whether a sample is representative is to subsequently audit the entire population.

Name: The only way to know with certainty whether a sample is representative is to subsequently audit the entire population.
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Quizplus · Accepted Answer

This is true because a sample is a smaller subset of a larger population, and there is always the possibility of sampling error or biases. The only way to confirm whether the sample is truly representative is to verify it against the entire population.

The Only Way to Know with Certainty Whether a Sample