pan class="emphasis"><em>x</em></span> = 0 or <span class="emphasis"><em>x</em></span>
          = 1.
        </p>
<p>
          If fraction of time on the left is a &#188;, it is only slightly more likely
          because the curve is quite flat bottomed.
        </p>
<pre class="programlisting"><span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="identifier">pdf</span><span class="special">(</span><span c