Quality Score Distribution
What Drives Quality? (Correlation)
Alcohol % by Quality Score
Higher-rated wines tend to have more alcohol — the strongest single predictor of quality in both styles.
Volatile Acidity by Quality Score
Higher volatile acidity (vinegary taste) hurts scores — low-rated wines have nearly twice the acidity of top-rated ones.
Sulphates by Quality Score
Red vs. White — Side by Side
White wines score slightly higher on average (5.88 vs 5.64) and carry far more residual sugar; red wines have more sulphates and acidity.
Alcohol vs Quality — Every Wine
Each dot is one wine. The upward trend confirms that higher alcohol generally means a higher score — though there's plenty of spread, so other factors still matter.