Did it really learn? Testing a model honestlyLesson 2 of 9Free preview
Wiggly or stiff: over- and underfitting
Train error only falls as the curve gains bends. Test error dips to 0.44 at degree 2, then explodes to 26,641 at degree 9.
Did it really learn? Testing a model honestlyLesson 2 of 9Free preview
Train error only falls as the curve gains bends. Test error dips to 0.44 at degree 2, then explodes to 26,641 at degree 9.