val of the mean</a>
<ul>
<li class="chapter" data-level="10.7.1" data-path="ch-probability-distributions.html"><a href="ch-probability-distributions.html#formulas-2"><i class="fa fa-check"></i><b>10.7.1</b> formulas</a></li>
</ul></li>
</ul></li>
<li class="chapter" data-level="11" data-path="ch-correlation-regression.html"><a href="ch-correlation-regression.html"><i class="fa fa-check"></i><b>11</b> Correlation and regression</a>
<ul>
<li class="chapter" data-level="11.1" data-path="ch-correlation-regressi