Chieh-An Chang
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Chieh-An (Andy) Chang

Data Science & Data Engineering co-op candidate building analytics pipelines, machine learning models, and AI applications from messy data to deployable systems.

Analytics system

PythonPandasA/B TestingSciPy

Analytics

Cancellation Policy for Ridesharing

A/B testing and root-cause analysis on large-scale ridesharing data

Overview

An analytics project that designs and evaluates a cancellation policy using A/B testing, root-cause analysis, and statistical validation.

Problem

Cancellation behavior can reduce platform reliability and revenue, but policy changes need causal evidence before rollout.

Dataset

A ridesharing dataset with more than 1M rows covering cancellation behavior, trip context, and treatment groups.

Approach

Used Pandas and Matplotlib for root-cause analysis, designed three treatment groups, and validated policy impact with SciPy and Statsmodels.

Results

Estimated roughly $6M in annual revenue savings under the proposed policy and identified key cancellation drivers.

Lessons Learned

Operational analytics needs both statistical significance and business framing so that recommendations connect to platform decisions.

Model / Pipeline

The implementation combines Python, Pandas, A/B Testing, SciPy, Statsmodels, Matplotlib with a repeatable workflow for data preparation, evaluation, and communication.

Tech Stack

PythonPandasA/B TestingSciPyStatsmodelsMatplotlib

Related Skills

Python - AdvancedPandas / GeoPandas - AdvancedSciPy / Statsmodels - IntermediateMatplotlib / Seaborn / Plotly - Intermediate

Tags

A/B TestingRoot Cause AnalysisPolicyRidesharing