Data Labs
Work through real business problems with real datasets, and build a portfolio that shows employers what you can do.
Wayfair·Sales analyticseasyE-commerce Sales Analysis
Clean two years of online store orders and turn them into a clear sales review for next year's plan.
- Data cleaning
- pandas
- Time series trends
2–3 hours4 datasets
Robinhood·Marketing analyticseasyMarketing Channel Performance
Compare six months of ad spend against signups and paying customers, then recommend where the next budget should go.
- Marketing metrics
- Joins and aggregation
- CAC and ROAS
2–3 hours2 datasets
Peloton·Business analyticsmediumCustomer Churn Analysis
Find out why subscribers of a fitness app cancel, and give leadership an evidence-backed plan to keep them.
- Churn analysis
- Cohorts and tenure
- Feature exploration
3–4 hours2 datasets- Wayfair·Customer analyticsmedium
RFM Customer Segmentation
Score every customer on recency, frequency and spend, build segments, and give the CRM team a plan for each one.
- RFM analysis
- Customer segmentation
- pandas
3–4 hours4 datasets 
Etsy·ExperimentationhardCheckout Redesign A/B Test
Analyze a four-week checkout experiment, deal with messy tracking, and decide whether the redesign should launch.
- A/B testing
- Hypothesis testing
- Confidence intervals
3–4 hours2 datasets
DoorDash·Machine learninghardDelivery Time Prediction
Build and evaluate a model that predicts food delivery times, then explain what makes deliveries slow.
- Regression
- Feature engineering
- scikit-learn
4–5 hours2 datasets