# Solutions

Reference solutions for the practical data science exercises.

Use this folder as a checkpoint after you attempt the work yourself first.

## How To Use This Folder Well

- Try the exercises and project prompts before reading the solutions.
- Compare your reasoning, tradeoffs, and validation choices, not just the final output.
- Treat the solutions as calibration material, not as the primary learning path.

## What Comes Next

- Return to [../README.md](../README.md) or the relevant practical-data-science subtrack after reviewing a solution.
- Continue to [../../16-model-evaluation/README.md](../../16-model-evaluation/README.md) if solution differences expose evaluation gaps.
- Continue to [../../09-mlops/README.md](../../09-mlops/README.md) if your next question is how to operationalize the work.
