bution, this method returns <code>P(X &lt;= x)</code>.  In other
 words, this method represents the (cumulative) distribution function
 (CDF) for this distribution.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>x</code> - the point at which the CDF is evaluated</dd>
<dt><span class="strong">Returns:</span></dt><dd>the probability that a random variable with this
 distribution takes a value less than or equal to <code>x</code></dd></dl>
</li>
</ul>
<a name="getNumericalMean()">
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