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<p><a href="page.php?w=Measurement_uncertainty">Measurement uncertainty</a><br/>
* <a href="page.php?w=Random_error">Random error</a></p>

<p><big> References </big></p>
<p><big> Sources </big></p>
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* Sudman, Seymour and Bradburn, Norman (1982). Asking Questions: A Practical Guide to Questionnaire Design. San Francisco: Jossey Bass. <br/>
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<p><big> External links </big></p>
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* <br/>
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