AI engineering glossary · Statistics inference
What is regression to the mean?
Regression to the mean: The tendency for extreme measurements to be followed by measurements closer to the average, because part of any extreme value is luck. It creates false impressions that an intervention worked.
Regression to the mean: an example
A salesperson with a record month usually sells less the next month, even with no change in effort.
Related terms
More Statistics inference terms
- Rejection region
- Resampling
- Sample ratio mismatch
- Sampling distribution
- Sequential testing
- Significance level
- Spearman rank correlation
- Standard error of the mean
Where you learn it
Regression to the mean is part of the AI Engineering Program, which teaches it with notes, a hands-on lab and an exam. The first lesson is free.