viations <em>hi</em> (hits) and <em>cr</em> (Correct
rejections) denote correct decisions; <em>mi</em> (misses) and
<em>fa</em> (false-alarms) denote incorrect decisions.</p></li>
<li><p>A range of vertical levels (in the middle) show the tree’s
cumulative performance in terms of two frugality measures
(<code>mcu</code> and <code>pci</code>) and various accuracy measures
(sensitivity, specificity, accuracy, and balanced accuracy (see <a href="FFTrees_accuracy_statistics.html">Accuracy statistics</a> for
d