______________________\n"</span><span class="special">;</span>
</pre>
<p>
            And now the important part: the sample sizes required. Class <code class="computeroutput"><span class="identifier">students_t_distribution</span></code> has a static
            member function <code class="computeroutput"><span class="identifier">find_degrees_of_freedom</span></code>
            that will calculate how large a sample size needs to be in order to give
            a definitive result.
          </p>
<p>
   