Question: KNN: 6 points Is KNN supervised? How does validation set help in KNN? What's the purpose of validation set here? Why do we normalize data

KNN: 6 points Is KNN supervised? How does validation set help

KNN: 6 points Is KNN supervised? How does validation set help in KNN? What's the purpose of validation set here? Why do we normalize data in KNN? What are the possible problems if k is an even number

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