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<h4>getNumericalMean</h4>
<pre>public&nbsp;double&nbsp;getNumericalMean()</pre>
<div class="block">Use this method to get the numerical value of the mean of this
 distribution.

 For number of successes <code>r</code> and probability of success <code>p</code>,
 the mean is <code>r * (1 - p) / p</code>.</div>
<dl><dt><span class="strong">Returns:</span></dt><dd>the mean or <code>Double.NaN</code> if it is not defined</dd></dl>
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