a class="anchor" aria-label="anchor" href="#source"></a></h2>
    <p>S. V. Zagona (ed.), <em>Studies and issues in smoking behavior</em>,
University of Arizona Press, 1967.</p>
    </div>
    <div class="section level2">
    <h2 id="references">References<a class="anchor" aria-label="anchor" href="#references"></a></h2>
    <p>The data also appear in</p>
<p>Brigitte Baldi and David S. Moore, <em>The Practice of Statistics in the
Life Sciences</em>, Freeman, 2009.</p>
    </div>

    <div class="section leve