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Definition

Imbalanced Datasets

An Imbalanced Dataset is a training dataset where one class (or category) is significantly overrepresented compared to other classes, causing models to favor the majority class.

Frequently Asked Questions

How do you handle imbalanced datasets?

By using resampling (oversampling minority or undersampling majority), adjusting loss weights, or using synthetic data algorithms like SMOTE.

Why is classification accuracy a poor metric for imbalanced datasets?

If 99% of data is negative, a model that classifies everything as negative is 99% accurate but useless. Metrics like F1-Score or AUC-ROC are preferred.

Quick Facts

  • CategoryModel Training
  • Key ApplicationSpam email database collection, transaction fraud database checking, and medical anomaly modeling.

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