far, and later we will encounter cases where a summary can provide a very misleading picture of the data being summarized.</p>
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<div id="uncertainty" class="section level3 hasAnchor" number="1.4.3">
<h3><span class="header-section-number">1.4.3</span> Uncertainty<a href="introduction.html#uncertainty" class="anchor-section" aria-label="Anchor link to header"></a></h3>
<p>The world is an uncertain place. We now know that cigarette smoking causes lung cancer, but this causation is probabilistic: A 68-ye