  3.370155625  9.60974536 15.34170932 30.95441200</span>
<span class="co">#&gt; 38 -0.56224282  2.012216050  7.50794616 16.25524142 25.21316081</span>
<span class="co">#&gt; 39 -0.41975773  0.005161406 -0.10744747 -1.31323943 -1.83528322</span>
<span class="co">#&gt; 40  1.18694529 -0.444774213 -0.34833190 -0.41250551 -0.01866634</span>
<span class="fu"><a href="https://rdrr.io/r/base/cat.html" class="external-link">cat</a></span><span class="op">(</span><span class="st">"Variance of row sums for ex_2 is "<