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<p>all factors are controlled and accounted for.</p>

<p>Also it is useful to recognize that the term "error" specifically refers to the outcome rather than the process (<a href="page.php?w=Type_I_and_type_II_errors">errors of rejection or acceptance of the hypothesis being tested</a>), or from the phenomenon of <a href="page.php?w=random_errors">random errors</a>. The terms flaw or mistake are recommended to differentiate procedural errors from these specifically defined outcome-based terms.</p>

<p><big> Bias of an estimator </big></p>
<p>Statistical bias</p><p>
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