Fix types, duplicates and outliers in two years of store sales and write down every decision you make.
Analysts lose a day each month cleaning the same export by hand.
Each criterion is scored 1 to 4. Required criteria must reach their threshold to pass; a high average doesn't make up for a missed one. One revision round is included.
| Criterion | Required | Threshold | Skill evidence |
|---|---|---|---|
Data cleaning Issues are found, fixed and justified. | Required | 3 of 4 | Data cleaning |
Reproducible code Script runs end to end on a fresh export. | Required | 3 of 4 | Python for data work |
Data and starter material are shared once you're enrolled.
Learning project. Company data stays private; the approved summary may go in your portfolio.
Portfolio: You may publish the approved summary, not the company data.
Backup contact if your mentor is unavailable: Sam Rivera, staff@demo.test