/dt>
<dd><p>Increase in hours of sleep.
</p></dd>
</dl>

<h4 class="subsubheading" id="Details-13"><span>Details<a class="copiable-link" href="#Details-13"> &para;</a></span></h4>

<p>The <code class="code">group</code> variable name may be misleading about the data: They
represent measurements on 10 persons, not in groups.
</p>
<h4 class="subsubheading" id="Source-58"><span>Source<a class="copiable-link" href="#Source-58"> &para;</a></span></h4>

<p>Cushny, A. R. and Peebles, A. R. (1905). The action of op