va">median</span><span class="op">)</span></span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span>   midwest northeast     south      west </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>      10.5       2.0      12.0       4.0 </span>
<span class="r-in"><span><span class="fu"><a href="https://rdrr.io/r/stats/kruskal.test.html" class="external-link">kruskal.test</a></span><span class="op">(</span><span class="va">sites</span> <span class="op">~</span> <span class="fu"><a href="htt