ml"><a href="ch-research.html"><i class="fa fa-check"></i><b>2</b> Hypothesis testing research</a>
<ul>
<li class="chapter" data-level="2.1" data-path="ch-research.html"><a href="ch-research.html#introduction"><i class="fa fa-check"></i><b>2.1</b> Introduction</a></li>
<li class="chapter" data-level="2.2" data-path="ch-research.html"><a href="ch-research.html#sec:variables"><i class="fa fa-check"></i><b>2.2</b> Variables</a></li>
<li class="chapter" data-level="2.3" data-path="ch-research.html"><a href="ch-