pan>
<span class="co">#&gt; Subgroup 1:</span>
<span class="co">#&gt;    Rank Regression </span>
<span class="co">#&gt;     Coefficients: </span>
<span class="co">#&gt;        mu  sigma   </span>
<span class="co">#&gt;     6.910  1.566   </span>
<span class="co">#&gt;  </span>
<span class="co">#&gt; Subgroup 2:</span>
<span class="co">#&gt;    Rank Regression </span>
<span class="co">#&gt;     Coefficients: </span>
<span class="co">#&gt;         mu   sigma   </span>
<span class="co">#&gt;     5.7141  0.3048