sity-function">Probability density function</a></li>
  <li><a href="#sampling-statement" id="toc-sampling-statement" class="nav-link" data-scroll-target="#sampling-statement">Sampling statement</a></li>
  <li><a href="#stan-functions" id="toc-stan-functions" class="nav-link" data-scroll-target="#stan-functions">Stan functions</a></li>
  </ul></li>
  <li><a href="#chi-square-distribution" id="toc-chi-square-distribution" class="nav-link" data-scroll-target="#chi-square-distribution">Chi-square distribution</