"op">=</span> <span class="va">Monoxide</span><span class="op">)</span></span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> 	Welch Two Sample t-test</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> data:  emission by company</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> t = 2.1187, df = 16.842, p-value = 0.04929</span>
<span class="r-out 