Skip to main content
Users
CloudPortalLogin
  • Powered byPowered by
Introduction to Sitecore Personalize
Managing accounts and system settings
Identifying guests
Introduction to experiments
Introduction to experiences
Decisioning
View dashboards
Developer Center
Connecting to an external system
Using client-side JavaScript
Using server-side JavaScript
AI in Personalize
Glossary
  • Sitecore Personalize
  • Introduction to experiments in Sitecore Personalize
  • Experiment metrics and calculations in Sitecore Personalize
  • Using the confidence index in an experiment
  • Understanding the confidence index formula

Understanding the confidence index formula

After a test is conclusive, the confidence index helps you determine how confident your organization can be with the results of the experiment, given a measured uplift or difference. You do not need to know this formula, we publish it for data scientists who are interested.

The Sitecore Personalize formula for calculating the confidence index is:

The cumulative distribution function (CDF) is for a normal distribution.

Do you have some feedback for us?

If you have suggestions for improving this article,

Privacy policySitecore Trust CenterCopyright © 1999-2026 Sitecore