K nearest neighbors (KNN) - explained | validation

See all my videos at https://www.tilestats.com/ 1. How KNN works 2. The steps in KNN (04:20) 3. Validation (LOOCV and hold-out) (06:47) 4. Imbalanced data sets (08:46) 5. How do we find an optimal value for k (09:34) 6. Standardization (14:11)