 for the Kruskal Wallis is only valid _after_ the distributional form
has been checked to be the same for all groups.</p>
    

        
    <h2 class="hasAnchor" id="format"><a class="anchor" href="#format"></a>Format</h2>

    <p>An artificial data frame with 18 observations in each of three groups.</p><dl class='dl-horizontal'>
<dt>x</dt><dd><p>measurements for group 1</p></dd>
<dt>y</dt><dd><p>measurements for group 2</p></dd>
<dt>z</dt><dd><p>measurements for group 3</p></dd></dl>
    
    <h2 class="h