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  • Joined May 13, 2026

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Me1wen/README.md

Hi, I'm Yiyang Lei (Kenny)

I'm a Business Analytics graduate focused on data analytics and business problem-solving.

I use SQL and Python to clean datasets, build analytical workflows, evaluate models, and translate results into business recommendations.

Skills

SQL | Python | Pandas | scikit-learn | Tableau | Excel | BigQuery

Featured Projects

Telecom Customer Churn Prediction

Built a machine learning workflow to predict customer churn, compare classification models, tune decision thresholds, and translate model results into retention recommendations.

Stratified Sampling SQL Pipeline for Classifier Recall Estimation

Built a BigQuery SQL workflow to estimate classifier recall using stratified sampling, weighted evaluation, and validation checks for imbalanced content-moderation data.

Career Focus

I'm currently looking for Data Analyst, Business Analyst, Marketing Analyst, and related analytics roles.

Pinned Loading

  1. stratified-sampling-classifier-recall-sql stratified-sampling-classifier-recall-sql Public

    BigQuery SQL workflow for estimating classifier recall using stratified sampling and weighted evaluation.

  2. telecom-customer-churn-prediction telecom-customer-churn-prediction Public

    Telecom customer churn prediction using Python, scikit-learn, model tuning, and retention-focused business insights.

    Jupyter Notebook