as fraction &lt;= -2, p = 0.0227501
Normal distribution with mean = 0 has fraction &gt; -2, p = 0.97725
</pre>
<p>
            Noting that p = 0.02 instead of our target of 0.001, we can now use
            <code class="computeroutput"><span class="identifier">find_scale</span></code> to give a
            new standard deviation.
          </p>
<pre class="programlisting"><span class="keyword">double</span> <span class="identifier">l</span> <span class="special">=</span> <span class="identifier">N01</span><