t">
<h4>getRegressionSumSquares</h4>
<pre>public&nbsp;double&nbsp;getRegressionSumSquares()</pre>
<div class="block">Returns the sum of squared deviations of the predicted y values about
 their mean (which equals the mean of y).
 <p>
 This is usually abbreviated SSR or SSM.  It is defined as SSM
 <a href="http://www.xycoon.com/SumOfSquares.htm">here</a></p>
 <p>
 <strong>Preconditions</strong>: <ul>
 <li>At least two observations (with at least two different x values)
 must have been added before invoking t