gt;</span>        y_bar</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> 1 0.04252261</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> [[3]]</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>      y_bar</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> 1 0.715582</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> [[4]]</span