lass="fu"><a href="https://rdrr.io/r/utils/head.html" class="external-link">head</a></span><span class="op">(</span><span class="va">reftab</span>, <span class="fl">2</span><span class="op">)</span></span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span>                population      key distribution    age    mu  sigma   nu    tau</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> 944 preliminary_standards gsed2406          BCT 0.0000 11.46 0.2075 1.42 34.189</span>
<span class="r-