Table 3.

Friedman’s test $MS{E}_{predict}^{\left(i\right)}$ and ${\overline{R}}^2{}_{predict}^{\left(i\right)}$.

		MSE ${}_{\mathit{predict}}^{\left(\mathit{i}\right)}$			${\overline{\mathit{R}}}^2{}_{\mathit{predict}}^{\left(\mathit{i}\right)}$
Filter	N	${\chi }^{\mathbf{2}}$	df	Sig.	${\chi }^{\mathbf{2}}$	df	Sig.
quartile = 1	228	72.34	2	0.000	74.00	2	0.000
quartile = 2	261	54.51	2	0.000	50.85	2	0.000
quartile = 3	276	74.11	2	0.000	68.94	2	0.000