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Stratified Sampling & Cross-Validation: Keys to Fair, Accurate ML

  • Stratified sampling and cross-validation are crucial methods for fair and accurate machine learning, especially with imbalanced or high-stakes datasets.
  • Randomly splitting data may lead to biased models that ignore minority cases, highlighting the importance of proper data division for model success.
  • The author shares a personal experience where initial model success on paper did not translate to real-world tests, emphasizing the significance of effective data splitting.
  • Understanding stratified sampling and cross-validation can significantly improve model accuracy and fairness by preserving class distribution and enhancing training procedures.

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