
<span id="cb21-2"><a href="Intro.html#cb21-2"></a>jae <span class="op">%&gt;%</span></span>
<span id="cb21-3"><a href="Intro.html#cb21-3"></a><span class="st">  </span><span class="co"># By week</span></span>
<span id="cb21-4"><a href="Intro.html#cb21-4"></a><span class="st">  </span><span class="kw">group_by</span>(week) <span class="op">%&gt;%</span></span>
<span id="cb21-5"><a href="Intro.html#cb21-5"></a><span class="st">  </span><span class="co"># Mean sleep hours </span></span>
<span id="cb21-6"><a h