SAS: What does the last two result columns (in outstats= of Proc Compare mean?
<p>I have the following <code>proc compare</code> in SAS:</p>

<pre><code>proc compare METHOD=ABSOLUTE CRITERION=0.0001 BRIEFSUMMARY
    base=win.&amp;table.
    compare=lin.&amp;table.
    outstats=&amp;table.1
    OUTNOEQUAL outbase outcomp ;
run;
</code></pre>

<p>This gives me the following table <code>outstats</code> where the last two columns read <code>Statistic for Difference Values</code> and <code>Statistic for Percent Difference Values</code></p>

<p><a href="https://i.stack.imgur.com/tXezU.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/tXezU.png" alt="enter image description here"></a></p>

<p><strong>What do these two last columns mean?</strong> I have the same values for <code>max</code> and <code>min</code>, so I expect to have 0 in these columns.</p>