Mandarvaa

Freelance Data Analyst — Self-employed (2025–Present)

Upwork • Freelance

May 2026 - Present • 2 mos

Working as a freelance data analyst and biostatistics researcher, applying R and Python to real-world datasets across public health, clinical research, and machine learning. Key projects include: Built and compared multiple classification models (Random Forest, Logistic Regression, SVM, Gradient Boosting) on the Wisconsin Breast Cancer Dataset, achieving strong predictive accuracy with Random Forest as the top performer Conducted statistical analysis of Mongolian meat price data using correlation analysis, OLS regression, and ARIMA time series modeling Cleaned and analyzed national household socioeconomic survey data (Stata files) to study unemployment trends Competed in a Kaggle multiclass classification challenge using LightGBM and ensemble methods I bring a strong foundation in biostatistics and epidemiology (certified through Harvard and Johns Hopkins), with hands-on experience turning messy, real-world data into clear, actionable insights for clients and research teams.