What is it?

Regression to the mean is a statistical phenomenon where extreme results are likely to move closer to average over time. Apparent improvements or declines may normalise naturally.

This concept is critical in performance interpretation.

Examples in Action

• Performance spikes following a change
  
• Temporary drops after anomalies
  
• Interpreting early test results
  
• Evaluating short-term success
  

Typical Outcomes / Results

• Reduced false attribution of impact
  
• Improved patience in analysis
  
• Better long-term evaluation
  
• More disciplined decision-making
  

This glossary entry reflects established statistical principles.