Titanic Survival Analysis
2,224 passengers. 1,500+ lives lost. What determined who lived?
38.4%
Overall Survival Rate
891
Passengers Analyzed
83.2%
Model Accuracy (GB)
+21.6pp
vs. Baseline Improvement
Survival Rate by Class
1st class passengers ~3× more likely to survive than 3rd class
Survival Rate by Sex
Women were 4× more likely to survive than men
Survival Rate by Age Band
Children (≤12) had highest survival rate at 58%
Survival Heatmap — Class × Sex
The interaction effect is dramatic: 1st-class women at 97% vs 3rd-class men at 13%
Survival Rate by Family Size
Families of 2–4 had best outcomes; solo travelers and large families fared worst
Feature Importance (Gradient Boosting)
Sex is the dominant predictor, followed by Fare and Age
Model Confusion Matrix — Gradient Boosting (Test Set, n=179)
Correctly predicted 149/179 passengers. Recall on "Died" class is 91%; "Survived" is 72%