> For the complete documentation index, see [llms.txt](https://b-greve.gitbook.io/beginners-guide-to-clean-data/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://b-greve.gitbook.io/beginners-guide-to-clean-data/data-range-problems.md).

# Data range problems

- [Unexpected values](https://b-greve.gitbook.io/beginners-guide-to-clean-data/data-range-problems/untitled.md)
- [Outliers](https://b-greve.gitbook.io/beginners-guide-to-clean-data/data-range-problems/outliers.md)
- [Freak cases](https://b-greve.gitbook.io/beginners-guide-to-clean-data/data-range-problems/freak-cases.md)