ibution. This distribution has degree of freedom reduced
based on the sample sizes and the variances of the group tests. The present
function returns the rectified degree of freedom</p>
    </div>

    <div id="ref-usage">
    <div class="sourceCode"><pre class="sourceCode r"><code><span><span class="fu">WelchDegreeOfFreedom</span><span class="op">(</span><span class="va">dta</span>, <span class="va">cols</span>, <span class="va">groupingcols</span><span class="op">)</span></span></code></pre></div>
    </d