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<a accesskey="3" href="page.php?w=imputation_%28statistics%29&amp;p=2">3.Next</a>
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<p>In <a href="page.php?w=statistics">statistics</a>, <b>imputation</b> is the process of replacing <a href="page.php?w=missing_data">missing data</a> with substituted values. When substituting for a data point, it is known as "<b>unit imputation</b>"; when substituting for a component of a data point, it is known as "<b>item imputation</b>". There are three main problems that missing data causes: missing data can introduce a substantial amount of <a href="page.php?w=bias_%28statistics%29">bias</a>, make the handling and analysis of the data more</p><p>
<a accesskey="3" href="page.php?w=imputation_%28statistics%29&amp;p=2">3.Next</a>
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