>#&gt;</span> data:  production by location</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> t = -2.266, df = 20.619, p-value = 0.03435</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> alternative hypothesis: true difference in means is not equal to 0</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> 95 percent confidence interval:</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>  -0.42213539 -0.01786461</span>
<span class="r-out co"><span class="r-pr">#&gt