. This formulation stems from the fact that Nadeau and Bengio
(2003) proved there is no unbiased estimator, but it can be approximated
with <span class="math inline">\(\rho = \frac{1}{k}\)</span>.</p>
</div>
<div class="section level3">
<h3 id="repeated-k-fold-cross-validation-correction">Repeated k-fold cross-validation correction<a class="anchor" aria-label="anchor" href="#repeated-k-fold-cross-validation-correction"></a>
</h3>
<p>Repeated <span class="math inline">\(k\)</span>-fold cross-validation
is mo