

<p>The <code>Oxboys</code> data frame has 234 rows and 4 columns.
</p>


<h3>Format</h3>

<p>This data frame contains the following columns:
</p>

<dl>
<dt>Subject</dt><dd>
<p>an ordered factor giving a unique identifier for each boy in
the experiment
</p>
</dd>
<dt>age</dt><dd>
<p>a numeric vector giving the standardized age (dimensionless)
</p>
</dd>
<dt>height</dt><dd>
<p>a numeric vector giving the height of the boy (cm)
</p>
</dd>
<dt>Occasion</dt><dd>
<p>an ordered factor - the result of converting 