s="external-link">mean</a></span><span class="op">(</span><span class="va">arr_delay</span><span class="op">)</span>, m_dep <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/mean.html" class="external-link">mean</a></span><span class="op">(</span><span class="va">dep_delay</span><span class="op">)</span><span class="op">)</span><span class="op">]</span></span>
<span><span class="va">flights</span><span class="op">[</span><span class="va">origin</span> <span class="op">==</span> <spa