Multiple Choice Flashcards on 01 Databricks Certified Machine Learning Associ...

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Flashcard Practice Databricks Certified Machine Learning Associate Multiple Choice

A healthcare team uses random cross-validation folds, but patients can have multiple visits. Validation scores are high because visits from the same patient appear in both training and validation folds. What is the key issue?

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The split strategy leaks patient-level information across folds. Cross-validation was used instead of a train-validation split. Use grouped folds or a patient-held-out validation split. The evaluator should use training accuracy instead of validation metrics.

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