tions        275         265                           275         265</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>   Difference t-stat</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> 1       5.14   11.4</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> 2      0.272   1.07</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> 3          0      0</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> 4                  </span>
<span class="r-in"><span