AI engineering glossary · Classical ML algorithms
What is odds ratio?
Odds ratio: The factor by which the odds of an outcome multiply when a feature rises by one unit. In logistic fitting it equals e raised to that feature's weight. A value above 1 means the feature raises the odds, below 1 lowers them, and exactly 1 means no effect.
Odds ratio: an example
A weight of 0.69 on has_coupon gives an odds ratio of about 2, so customers with a coupon have roughly double the odds of buying.
Related terms
- Log-odds
- Logistic regression
- Coefficient
- Relative risk
More Classical ML algorithms terms
- One-class SVM
- One-vs-one
- One-vs-rest
- Ordinary least squares
- Out-of-bag error
- Perceptron
- Permutation importance
- Polynomial kernel
Where you learn it
Odds ratio is part of the AI Engineering Program, which teaches it with notes, a hands-on lab and an exam. The first lesson is free.