What is data normalization in data mining?

Updated May 15, 2026

Short answer

Normalization scales data into a standard range.

Deep explanation

It ensures features contribute equally by scaling them typically between 0 and 1 or standardizing to mean 0 and variance 1.

Real-world example

Scaling income and age features in prediction models.

Common mistakes

  • Skipping normalization for distance-based algorithms.

Follow-up questions

  • MinMax vs StandardScaler?
  • When not needed?

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