span class="special">,</span>        <span class="comment">// difference from true mean to detect</span>
   <span class="number">0.05</span><span class="special">,</span>       <span class="comment">// maximum risk of falsely rejecting the null-hypothesis.</span>
   <span class="number">0.1</span><span class="special">,</span>        <span class="comment">// maximum risk of falsely failing to reject the null-hypothesis.</span>
   <span class="number">0.13</span><span class="special">);</span>      <span cla