span> <span class="op">+</span> <span class="va">weight</span> <span class="op">+</span> <span class="va">age</span> <span class="op">+</span> <span class="va">male</span>, data<span class="op">=</span><span class="va">class</span><span class="op">)</span></span>
<span><span class="fu"><a href="https://rdrr.io/r/stats/anova.html" class="external-link">anova</a></span><span class="op">(</span><span class="va">mod1</span><span class="op">)</span></span></code></pre></div>
<pre><code><span><span class="co">## 