 class="r-out co"><span class="r-pr">#&gt;</span>    .x_1               5.843    0.105   55.447    0.000</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>    .x_2               3.057    0.035   86.196    0.000</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>    .x_3               3.758    0.110   34.094    0.000</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>    .x_4               1.199    0.062   19.335    0.000</span>
<span class="r-out co"><span class="r-pr">#&g