tml"><a href="sec:contrast:covariate.html#estimating-a-group-difference-and-controlling-for-a-covariate"><i class="fa fa-check"></i><b>7.2.1</b> Estimating a group-difference and controlling for a covariate</a></li>
<li class="chapter" data-level="7.2.2" data-path="sec:contrast:covariate.html"><a href="sec:contrast:covariate.html#estimating-differences-in-slopes"><i class="fa fa-check"></i><b>7.2.2</b> Estimating differences in slopes</a></li>
</ul></li>
<li class="chapter" data-level="7.3" data-path="sec:i