   -0.521   -0.503 </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> SW p-val </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>    0.095 </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">Devmath</span><span class="op">$</span><span class="va">score</span>, mu <span class="op">=</span> <span class="fl">80</span>, alternative <span class="op">=</span> <span c