      </span><span class="n">x2</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">amean</span><span class="w"> </span><span class="o">-</span><span class="w"> </span><span class="mf">1.0_wp</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">zppf</span><span class="o">*</span><span class="n">sd</span>
<span class="w">                  </span><span class="n">ix2</span><span class="w"> </span><span class="o">=</span><span cl