ref="https://dplyr.tidyverse.org/reference/mutate.html">mutate</a></span> <span class="op">(</span>time<span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/factor.html">as.factor</a></span><span class="op">(</span><span class="va">time</span><span class="op">)</span><span class="op">)</span></code></pre></div>
</div>
<div id="factorial-a2" class="section level3" number="15.0.2">
<h3>
<span class="header-section-number">15.0.2</span> Activity 2: Descriptive statistics<a class="anchor" a