y</span><span class="op">)</span></span>
<span class="r-in"><span class="fu"><a href="https://rdrr.io/r/graphics/plot.html" class="external-link">plot</a></span><span class="op">(</span><span class="va">res</span><span class="op">$</span><span class="va">betahat</span><span class="op">/</span><span class="va">res</span><span class="op">$</span><span class="va">sebetahat</span><span class="op">)</span></span>
<span class="r-plt img"><img src="univariate_regression-1.png" alt="" width="700" height="433"></spa