robability
            that the difference is real?" Parameter finders can answer questions
            like this, and are necessarily different for each distribution. They
            are implemented as static member functions of the distributions, for
            example:
          </p>
<pre class="programlisting"><span class="identifier">students_t</span><span class="special">::</span><span class="identifier">find_degrees_of_freedom</span><span class="special">(</span>
   <span class="number">1.3</span><