160;&#160;All incalculable 
 within-group averages are shown with a red “n/c”.</p>
<p style="font-size: 12pt;"><i>Between groups</i>:  This is enabled 
 only if at least two groups of <a href="javascript:TextPopup(this)" id="HotSpot11039" class="glossterm">taxa</a><script type="text/javascript">//<![CDATA[
TextPopupInit('HotSpot11039', 'POPUP11039');
//]]></script><span class="glosstext" id="POPUP11039" style="display: none;"> A taxon is the individual unit whose evolutionary relationship is being inv