class="co">## fev$height:    Str  yes    65     0   65.95     3.193     58.00     63.50  </span></span>
<span><span class="co">##                          Mdn       75%       Max     </span></span>
<span><span class="co">##    fev$fev:  All          2.547     3.118     5.793  </span></span>
<span><span class="co">##    fev$fev:    Str  no    2.465     3.048     5.793  </span></span>
<span><span class="co">##    fev$fev:    Str  yes   3.169     3.751     4.872  </span></span>
<span><span class="co">## fev$he