s="fu"><a href="../reference/filter_dt.html">filter_dt</a></span><span class="op">(</span><span class="va">carrier</span> <span class="op">==</span> <span class="st">"AA"</span><span class="op">)</span> <span class="op"><a href="https://magrittr.tidyverse.org/reference/pipe.html" class="external-link">%&gt;%</a></span> </span>
<span>  <span class="fu"><a href="../reference/summarise_dt.html">summarise_dt</a></span><span class="op">(</span><span class="fu"><a href="https://rdrr.io/r/base/mean.html" class="ex