RT) to explain their GCSE exam score, allowing for a random intercept for each school:</p>
<div class="sourceCode" id="cb2"><pre class="downlit sourceCode r">
<code class="sourceCode R"><span class="va">fm1</span> <span class="op">&lt;-</span> <span class="fu">lme4</span><span class="fu">::</span><span class="fu"><a href="https://rdrr.io/pkg/lme4/man/lmer.html">lmer</a></span><span class="op">(</span><span class="va">normexam</span> <span class="op">~</span> <span class="va">standLRT</span> <span class="op"