>;</span>
<span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"Fraction 3 standard deviations within either side of mean is "</span>
  <span class="special">&lt;&lt;</span> <span class="number">1</span> <span class="special">-</span>  <span class="identifier">cdf</span><span class="special">(</span><span class="identifier">complement</span><span class="special">(</span><span class="identifier">s</span><span class="special">,</span> <span class="number">3</span> <s