Table 2.

Computed MAE (using the k-fold strategy with $k=10$) for different numbers m of principal components. In bold: the three values of m that obtained better performance

m	MAE
1	0.0187
2	0.0188
3	0.0189
4	0.0192
5	0.0194
6	0.0194
7	0.0196
8	0.0199