lor: #BCBCBC;">12</span> mass       744 bytes 208 bytes  1.34   1.14 </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #BCBCBC;">13</span> birth_year 744 bytes 208 bytes  1.34   1.14 </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #BCBCBC;">14</span> height     400 bytes 176 bytes  0.718  0.962</span>
<span class="r-in"><span></span></span>
<span class="r-in"><span><span class="co"># Grouped dataframe summary</span></span></span>
<span clas