ction level3" number="17.4.2">
<h3><span class="header-section-number">17.4.2</span> Sampling Statement</h3>
<p><code>y ~</code> <strong><code>scaled_inv_chi_square</code></strong><code>(nu, sigma)</code></p>
<p>Increment target log probability density with <code>scaled_inv_chi_square_lupdf(y | nu, sigma)</code>.
<!-- real; scaled_inv_chi_square ~; -->
</p>
</div>
<div id="stan-functions-34" class="section level3" number="17.4.3">
<h3><span class="header-section-number">17.4.3</span> Stan Functions</h3>
<!-