       ====
            1     \          _ 4
           ----    &gt;    (x - x)  - 3
              4   /       i
           n s    ====
                  i = 1
</pre>
<p>Exemplo:
</p>
<pre class="example">(%i1) load (descriptive)$
(%i2) load (numericalio)$
(%i3) s1 : read_list (file_search (&quot;pidigits.data&quot;))$
(%i4) kurtosis (s1), numer;
(%o4)                  - 1.273247946514421
(%i5) s2 : read_matrix (file_search (&quot;wind.data&quot;))$
(%i6) kurtosis (s2);
(%o6) [- .2715445622195385, 0.1199987