ided by the degrees of freedom,
 usually abbreviated MSE.</div>
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<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/math3/stat/regression/SimpleRegression.html#getN()">getN</a></strong>()</code>
<div class="block">Returns the number of observations that have been added to the model.</div>
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<td class="colFirst"><code>double</code></td>
<td class="colLast"><code><strong><a