<span class="kw">summary</span>(ozonedat<span class="op">$</span>Temp2)</a>
<a class="sourceLine" id="cb9-6" data-line-number="6"><span class="co">#&gt;    Min. 1st Qu.  Median    Mean 3rd Qu.    Max. </span></a>
<a class="sourceLine" id="cb9-7" data-line-number="7"><span class="co">#&gt;   5.700   7.100   7.900   7.779   8.450   9.700</span></a></code></pre></div>
<p>As other confounding variables, we chose solar radiation (<code>Solar.R</code>) and average wind speed (<code>Wind</code>) so that <code>form