 combining them into a single dataframe is straightforward. Here we use the <code class="docutils literal notranslate"><span class="pre">merge()</span></code> function in <code class="docutils literal notranslate"><span class="pre">DataFrame</span></code> to combine the school demographcs and ela test results into a single data frame. We merge them “on” the <code class="docutils literal notranslate"><span class="pre">dbn</span></code> and <code class="docutils literal notranslate"><span class="pre">ay</