deviations of x values</dd></dl>
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<h4>getSumOfCrossProducts</h4>
<pre>public&nbsp;double&nbsp;getSumOfCrossProducts()</pre>
<div class="block">Returns the sum of crossproducts, x<sub>i</sub>*y<sub>i</sub>.</div>
<dl><dt><span class="strong">Returns:</span></dt><dd>sum of cross products</dd></dl>
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