fa-check"></i><b>4.5</b> Ratio</a></li>
<li class="chapter" data-level="4.6" data-path="ch-levelsofmeasurement.html"><a href="ch-levelsofmeasurement.html#sec:orderinglevelsofmeasurement"><i class="fa fa-check"></i><b>4.6</b> Ordering of levels of measurement</a></li>
</ul></li>
<li class="chapter" data-level="5" data-path="ch-validity.html"><a href="ch-validity.html"><i class="fa fa-check"></i><b>5</b> Validity</a>
<ul>
<li class="chapter" data-level="5.1" data-path="ch-validity.html"><a href="ch-validity.h