t="433"></span>
<span class="r-in"><span><span class="fu"><a href="https://rdrr.io/r/base/with.html" class="external-link">with</a></span><span class="op">(</span>data <span class="op">=</span> <span class="va">Anesthet</span>,</span></span>
<span class="r-in"><span><span class="fu"><a href="https://rdrr.io/r/stats/t.test.html" class="external-link">t.test</a></span><span class="op">(</span><span class="va">recover</span>, conf.level <span class="op">=</span> <span class="fl">0.90</span><span class="op">)</