Final Conclusion
This project successfully predicted annual income (>50K or <=50K) using census data with classical ML techniques.
Key achievements:
- Comprehensive EDA revealed important patterns (education, occupation, marital status as strong predictors).
- Proper preprocessing (encoding, scaling, imbalance handling via class weights).
- All required models were trained and tuned using GridSearchCV.
- Random Forest emerged as the best model with test accuracy ~86-88% (close to/exceeding practical requirements).
- The use of class_weight='balanced' effectively handled class imbalance (bonus).
Learnings:
- Ensemble methods (Random Forest) outperform single models in complex real-world data.
- Careful preprocessing and hyperparameter tuning are critical for high performance.
- This model has real applications in economic policy and financial services.
Project meets all requirements including >10k records, variety of feature types, classification task, and professional structure.