hesis about a difference in proportion</dd>
      </dl><dl><dt>

          <code><a href="test_rdiff.html">test_rdiff()</a></code>

        </dt>
        <dd>Test a hypothesis about a difference in correlation strength</dd>
      </dl></div><div class="section level2">
      <h2 id="sample-data-sets">Sample data sets<a class="anchor" aria-label="anchor" href="#sample-data-sets"></a></h2>




    </div><div class="section level2">




      <dl><dt>

          <code><a href="data_altruism_happiness.html">dat