4" data-path="ch-levelsofmeasurement.html"><a href="ch-levelsofmeasurement.html"><i class="fa fa-check"></i><b>4</b> Levels of measurement</a>
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<li class="chapter" data-level="4.1" data-path="ch-levelsofmeasurement.html"><a href="ch-levelsofmeasurement.html#introduction-1"><i class="fa fa-check"></i><b>4.1</b> Introduction</a></li>
<li class="chapter" data-level="4.2" data-path="ch-levelsofmeasurement.html"><a href="ch-levelsofmeasurement.html#sec:nominal"><i class="fa fa-check"></i><b>4.2</b> Nominal</