ight:  All          61.50     65.50     74.00  </span></span>
<span><span class="co">## fev$height:    Str  no    61.00     64.50     74.00  </span></span>
<span><span class="co">## fev$height:    Str  yes   66.00     68.00     72.00</span></span></code></pre>
<p>In the output, we can see that overall descriptive statistics, as
well as descriptive statistics for each stratum (smoke = 1, smoke = 2)
are returned in the table.</p>
</div>
<div class="section level2">
<h2 id="descriptive-statistics-for-subsets">