()</pre>
<div class="block">Use this method to get the numerical value of the variance of this
 distribution.

 For shape parameter <code>alpha</code> and scale parameter <code>beta</code>, the
 variance is <code>alpha * beta^2</code>.</div>
<dl><dt><span class="strong">Returns:</span></dt><dd>the variance (possibly <code>Double.POSITIVE_INFINITY</code> as
 for certain cases in <a href="../../../../../org/apache/commons/math3/distribution/TDistribution.html" title="class in org.apache.commons.math3.distribu