om data set from <strong>West, Welch, Galecki (2006)</strong>. The data contains math testing scores from 1190 children in 312 different classroom within 107 unique schools. All classrooms are nested within schools, and all students are nested within a single classroom.</p>
<div class="sourceCode" id="cb10"><pre class="downlit sourceCode r">
<code class="sourceCode R"><span class="fu"><a href="https://rdrr.io/r/utils/data.html">data</a></span><span class="op">(</span><span class="st">"classroom"</span>, pac