/span>, <span class="fu"><a href="https://rdrr.io/r/stats/cor.html" class="external-link">var</a></span><span class="op">(</span><span class="va">ex_2</span><span class="op">$</span><span class="va">ROWSUM</span><span class="op">)</span>, <span class="st">"."</span>, sep <span class="op">=</span> <span class="st">""</span><span class="op">)</span>
<span class="co">#&gt; Variance of row sums for ex_2 is 218.8347.</span>
<span class="fu"><a href="https://rdrr.io/r/base/print.html" class="external-link">print<