><span class="op">)</span>
<span class="co">#&gt; # A tibble: 180 x 9</span>
<span class="co">#&gt;       id Reaction  Days Subject  cooksd mdffits covtrace covratio</span>
<span class="co">#&gt;    &lt;int&gt;    &lt;dbl&gt; &lt;dbl&gt; &lt;fct&gt;     &lt;dbl&gt;   &lt;dbl&gt;    &lt;dbl&gt;    &lt;dbl&gt;</span>
<span class="co">#&gt;  1     1     250.     0 308     1.48e-4 1.47e-4 0.00887      1.01</span>
<span class="co">#&gt;  2     2     259.     1 308     1.10e-3 1.09e-3 0.00558      1.01</span>
<sp