Train Validation Test Split
Domain: AI Fundamentals
🎯 Motivation
Divide data into three parts: train to learn, validation to tune, test to final-check.
📋 Concrete Example
Split 10000 examples: 8000 train, 1000 validation, 1000 test. Only touch test once at the end.
🔗 Analogy
Like splitting your study time: past papers (train), mock exam (validation), real exam (test).