<span class="op">/</span><span class="fu"><a href="https://rdrr.io/r/base/sum.html" class="external-link">sum</a></span><span class="op">(</span><span class="fl">20</span><span class="op">:</span><span class="fl">29</span><span class="op">)</span>, testNA <span class="op">=</span> <span class="cn">FALSE</span><span class="op">)</span></span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span> [1] 0.01640226</span>
</code></pre></div>
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  <div class="col-md-3 hidden-xs hidden-sm" 