n>
<span class="fu"><a href="https://rdrr.io/pkg/car/man/qqPlot.html">qqPlot</a></span><span class="op">(</span><span class="va">mod_factorial</span><span class="op">$</span><span class="va">lm</span><span class="op">$</span><span class="va">residuals</span><span class="op">)</span>
<span class="fu"><a href="https://rdrr.io/r/stats/shapiro.test.html">shapiro.test</a></span><span class="op">(</span><span class="va">mod_factorial</span><span class="op">$</span><span class="va">lm</span><span class="op">$</spa