span><span class="op">)</span> <span class="op">+</span> </span>
<span class="r-in"><span class="fu">guides</span><span class="op">(</span>fill <span class="op">=</span> <span class="st">"none"</span><span class="op">)</span> <span class="op">+</span> <span class="fu">scale_fill_brewer</span><span class="op">(</span><span class="op">)</span></span>
<span class="r-plt img"><img src="WOOL-1.png" alt="" width="700" height="433"></span>
<span class="r-in"><span class="fu"><a href="https://rdrr.io/r/stats/t.test