Bias-Variance Tradeoff

Finding the sweet spot between underfitting and overfitting

Model Complexity 5
Simple (High Bias) Complex (High Variance)

Model Fit

Optimal Complexity

Error Decomposition

Bias²
Variance
Total Error
Bias²
0.25
Variance
0.25
Total Error
0.50
Current Model State
Balanced model with moderate complexity. Both bias and variance contribute equally to total error.