Choose Your Level
Pick the difficulty that matches where you are. You can come back and try a harder level later.
Beginner
Clean a Messy CSV and Write an Insights Memo
Turn a realistic messy dataset into three insights a manager can act on.
2 hours 4 criteria
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Intermediate
Handling Missing Data in a Healthcare Dataset
Decide which imputation strategy to use for each column and defend every choice.
2 to 3 hours 4 criteria
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Advanced
Deduplication at Scale
Design a fuzzy-matching deduplication pipeline for a CRM with 500K records.
3 to 5 hours 4 criteria
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