# Data Drift

Learn about data drift

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### Population Stability Index (PSI): A Comprehensive Overview

What is the Population Stability Index (PSI)? How can you use it to detect data drift using Python? Is PSI the right method for you? This blog is the perfect read if you want answers to those questions.

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### Multivariate Drift Detection: A Comparative Study on Real-world Data

This blog introduces covariate shift and various approaches to detecting it. It then deep-dives into the various multivariate drift detection algorithms with NannyML on a real-world dataset.