class="co"># performs the test (here rectified df = 1.898876)</span></span></span>
<span class="r-in"><span><span class="fu">WelchDegreeOfFreedom</span><span class="op">(</span><span class="va">dta</span>, <span class="st">"DV.1"</span>,<span class="st">"grp"</span><span class="op">)</span></span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span> [1] 1.898876</span>
<span class="r-in"><span></span></span>
</code></pre></div>
    </div>
  </div>
  <div class="col-md-3 hidden-xs hidden-sm" id="pkg