>
<p>Flipping <code>x</code> and <code>y</code> axes, this confidence
interval <em>does</em> cover <code>3/2</code>, which suggests that the
data <em>do</em> fit the 2/3 power law!</p>
</div>
<div class="section level2">
<h2 id="code-box-13-2-testing-if-the-brain-body-mass-slope-is-23">Code Box 13.2: Testing if the brain-body mass slope is 2/3<a class="anchor" aria-label="anchor" href="#code-box-13-2-testing-if-the-brain-body-mass-slope-is-23"></a>
</h2>
<div class="sourceCode" id="cb3"><pre class="downlit 