How does test error behave as model flexibility increases?
A. It decreases continuously
B. It stays constant
C. It first decreases, then increases
D. It increases continuously

As model flexibility increases, test error typically decreases initially as the model captures underlying patterns. However, beyond a certain point, increased flexibility leads to overfitting, causing test error to rise. Thus, the correct behavior is that test error first decreases, then increases. ;

Answered by GinnyAnswer | 2025-07-05

As model flexibility increases, test error initially decreases as the model fits underlying patterns. However, after a certain point, test error increases again due to overfitting. The correct option is C: It first decreases, then increases.
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Answered by Anonymous | 2025-07-18