## What is a Dependent Variable?

A dependent variable is any variable that could be influenced by the intervention we are testing. In an A/B test this would be any outcomes of interest such as conversion rate, average revenue per user, average order value and others. A dependent variable is usually modeled as a random variable (a parameter behaving as if produced by a stochastic process).

Contrast this to an independent variable such as a user's age, sex, location, and so on, which is fixed in time and therefore cannot be influenced by anything a conversion rate optimization expert attempts.

## Related A/B Testing terms

Like this glossary entry? For an in-depth and comprehensive reading on A/B testing stats, check out the book "Statistical Methods in Online A/B Testing" by the author of this glossary, Georgi Georgiev.