Validation
Train/test splits, cross-validation, time-series CV, and data leakage.
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Validation
4 lessons · Read before practicing
Train/test split
- 1Purpose of Test SetEasy
- 2Choosing Train/Test Split RatioEasy
- 3Stratified Sampling DefinitionEasy
- 4Test Set Contamination Through Repeated UseMed
- 5Temporal Train/Test SplittingMed
- 6Train/Test Split on Small DatasetsMed
- 7Training Set Evaluation InsufficiencyMed
- 8Statistical Significance of Performance DifferencesHard
- 9Distribution Mismatch in Train/Test SplitHard