mpt highlight-none notranslate"><div class="highlight"><pre><span></span>[16]:
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<div class="input_area highlight-ipython3 notranslate"><div class="highlight"><pre>
<span></span><span class="c1"># Define new grouping variables, in this case, for the different choice pairs, but any grouping var can do</span>
<span class="n">data</span><span class="p">[</span><span class="s1">&#39;choice_pair&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="s1">&#39;AB&#39;</span>
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