데이터분석 – TildAlice

Polars vs Pandas 성능 비교: 대용량 데이터 처리 속도가 10배 빠른 이유와 마이그레이션 실전 가이드

2026년 01월 15일

Polars processed 10GB CSV in 8 seconds vs Pandas' 94 seconds. Lazy evaluation and parallel execution explained with migration code examples.

2025년 12월 02일

Turn Kaggle projects into job offers: structure your portfolio to show business impact, not just accuracy scores. Real hiring manager tips.

2025년 12월 01일

A/B test statistical power: detect 5% conversion lift with 95% confidence. Python code for sample size, p-values, and effect size analysis.

2025년 12월 01일

Prophet vs ARIMA for sales forecasting: MAPE comparison on seasonal retail data. When each model wins and why (with prediction intervals).

2025년 11월 30일

Customer churn pipeline: handle class imbalance, engineer retention features, and deploy XGBoost with 0.87 ROC-AUC. Production-ready code.

2025년 11월 30일

EDA beyond histograms: find the 3 Titanic variables that predict survival better than passenger class. Correlation heatmap + interaction plots.

2025년 11월 29일

Data analyst roadmap: 5 Kaggle projects that replicate real job tasks (EDA, ML pipeline, time series, A/B test). Zero to portfolio in 8 weeks.

2025년 11월 28일

5 data analysis techniques used daily by professional analysts — with Python code you can run in 10 minutes. EDA to hypothesis testing.