Precision
Domain: NLP Fundamentals
🎯 Motivation
Of the items the model predicted as positive, how many were actually positive. Measures quality of positive predictions.
📋 Concrete Example
Model predicts 10 emails are spam, 8 actually are. Precision = 8/10 = 0.8. 2 were false alarms.
🔗 Analogy
Like a fisherman checking his catch - of the 10 fish he kept, how many were the target species.