<span class="dv">5</span>] <span class="sc">^</span> <span class="dv">2</span></span>
<span id="cb2-18"><a href="#cb2-18" aria-hidden="true" tabindex="-1"></a>xbeta <span class="ot">&lt;-</span> xbeta <span class="sc">+</span> delta <span class="sc">*</span> (<span class="dv">2</span> <span class="sc">*</span> trt <span class="sc">-</span> <span class="dv">1</span>)</span>
<span id="cb2-19"><a href="#cb2-19" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb2-20"><a href="#cb2-20" aria-hidden="true" 