obal namespace for ease of use:</span>
<span class="keyword">using</span> <span class="keyword">namespace</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">math</span><span class="special">;</span>
<span class="keyword">using</span> <span class="keyword">namespace</span> <span class="identifier">std</span><span class="special">;</span>

<span class="keyword">void</span> <span class="identifier">single_sample_find_df</span><span class="special">(</span>
   <s