Credible Interval (CrI)

The Bayesian equivalent of a confidence interval. Instead of offering a single “best” number (e.g., ROI = 4), a credible interval gives the range within which the true value is likely to fall — for example, “there’s a 90% probability that ROI lies between 3.2 and 4.8.” This expresses how confident the model is in its estimates and helps marketers assess both opportunity and risk.