A random bias exists when the results of a sample show a persistent tendency to deviate in one direction from the true value of the population parameter.

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Quizplus · Accepted Answer

A random bias does not exist; the term is a contradiction. Bias in sampling means a consistent deviation from the true value, which is not random. Random errors, on the other hand, are unpredictable and vary in no specific direction from one measurement to the next.

A Random Bias Exists When the Results of a Sample