="r-pr">#&gt;</span> 95 percent confidence interval:</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>  17.37768 23.65089</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> sample estimates:</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> mean of x </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>  20.51429 </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
<span class="r-in"><span></span></span>
</code></pre></div>
    </div>
  </div>
  