rved by some to the case
          where the successes parameter r is an integer. This integer version is
          also called the <a href="http://mathworld.wolfram.com/PascalDistribution.html" target="_top">Pascal
          distribution</a>.
        </p>
<p>
          This implementation uses real numbers for the computation throughout (because
          it uses the <span class="bold"><strong>real-valued</strong></span> incomplete beta
          function family of functions). This real-valued version is a