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451Confusion Matrix Fundamentals
452Accuracy: When It Works and When It Fails
453Precision: Measuring Positive Prediction Quality
454Recall (Sensitivity): Measuring Positive Detection Rate
455Specificity and True Negative Rate
456F1 Score: Harmonic Mean of Precision and Recall
457F-Beta Score: Weighted Precision-Recall Trade-off
458Class-Specific vs Macro vs Micro Averaging
459Weighted Averaging for Imbalanced Classes
460ROC Curve: Visualizing Classifier Performance
461AUC-ROC: Area Under the ROC Curve
462Precision-Recall Curve for Imbalanced Data
463Average Precision and AUC-PR
464Cohen's Kappa: Agreement Beyond Chance
465Matthews Correlation Coefficient
466Log Loss (Cross-Entropy Loss)
467Brier Score for Probability Calibration
468Choosing Metrics Based on Cost Functions
469Mean Absolute Error (MAE)
470Mean Squared Error (MSE) and RMSE
471R² Score (Coefficient of Determination)
472Adjusted R² for Model Comparison
473Mean Absolute Percentage Error (MAPE)
474Huber Loss and Robust Metrics
475Median Absolute Error
476Quantile Loss for Probabilistic Predictions
477Residual Analysis and Diagnostic Plots
478Domain-Specific Metrics and Business Objectives
479Ranking Problems vs Classification Problems
480Receiver Operating Characteristic (ROC) Curve
481Area Under ROC Curve (AUC-ROC)
482Precision-Recall Curve
483Area Under Precision-Recall Curve (AP)
484Brier Score for Probabilistic Calibration
485Log Loss (Cross-Entropy)
486Mean Average Precision at K (MAP@K)
487Normalized Discounted Cumulative Gain (NDCG)
488Mean Reciprocal Rank (MRR)
489Calibration Plots and Reliability Diagrams
490Expected Calibration Error (ECE)

451Confusion Matrix Fundamentals
452Accuracy: When It Works and When It Fails
453Precision: Measuring Positive Prediction Quality
454Recall (Sensitivity): Measuring Positive Detection Rate
455Specificity and True Negative Rate
456F1 Score: Harmonic Mean of Precision and Recall
457F-Beta Score: Weighted Precision-Recall Trade-off
458Class-Specific vs Macro vs Micro Averaging
459Weighted Averaging for Imbalanced Classes
460ROC Curve: Visualizing Classifier Performance
461AUC-ROC: Area Under the ROC Curve
462Precision-Recall Curve for Imbalanced Data
463Average Precision and AUC-PR
464Cohen's Kappa: Agreement Beyond Chance
465Matthews Correlation Coefficient
466Log Loss (Cross-Entropy Loss)
467Brier Score for Probability Calibration
468Choosing Metrics Based on Cost Functions
469Mean Absolute Error (MAE)
470Mean Squared Error (MSE) and RMSE
471R² Score (Coefficient of Determination)
472Adjusted R² for Model Comparison
473Mean Absolute Percentage Error (MAPE)
474Huber Loss and Robust Metrics
475Median Absolute Error
476Quantile Loss for Probabilistic Predictions
477Residual Analysis and Diagnostic Plots
478Domain-Specific Metrics and Business Objectives
479Ranking Problems vs Classification Problems
480Receiver Operating Characteristic (ROC) Curve
481Area Under ROC Curve (AUC-ROC)
482Precision-Recall Curve
483Area Under Precision-Recall Curve (AP)
484Brier Score for Probabilistic Calibration
485Log Loss (Cross-Entropy)
486Mean Average Precision at K (MAP@K)
487Normalized Discounted Cumulative Gain (NDCG)
488Mean Reciprocal Rank (MRR)
489Calibration Plots and Reliability Diagrams
490Expected Calibration Error (ECE)

Lesson 469 of 3,538·11. Model Evaluation MetricsPro lesson

Mean Absolute Error (MAE)

Understand MAE as the average absolute difference between predictions and targets, its interpretation, and robustness to outliers.

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