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Sebastian VillarroelSV
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Sebastian Villarroel

@sebastianvillarroel

Data science graduate who built an XGBoost house-price model with 8.11% mean absolute percentage error.

Bolivia
Message

I built an end-to-end house-price prediction pipeline using the Ames Housing dataset, from data cleaning and feature engineering to model comparison. After tuning eight models with cross-validation, I selected XGBoost, which achieved 8.11% mean absolute percentage error on unseen test data.

For a project analyzing Olist’s Brazilian e-commerce dataset, I used SQL to examine revenue, order volume, seller performance, and product trends. I graduated from the University of Washington with a Bachelor of Science in Statistics in Data Science.

Experience

Work history, roles, and key accomplishments

FU

Orientation Leader

First-Year Programs UW

Jun 2024 - Sep 2024 (3 months)

Led groups of incoming students through orientation sessions, fostering a welcoming and inclusive campus environment. Communicated complex information clearly and effectively to students and families from various backgrounds.

Education

Degrees, certifications, and relevant coursework

University of Washington logoUW

University of Washington

Bachelor of Science, Statistics in Data Science

Grade: 3.53

Pursuing a Bachelor of Science in Statistics in Data Science, with an expected graduation in June 2026. Relevant coursework includes statistical machine learning, statistical computing, and regression analysis.

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