Confidence Level

Definition:

A confidence level is a measure of uncertainty about whether a data set is within the range that we would expect from the default population. It refers to the percentage of all possible samples that the parameter can be expected to fall within the bounds of the interval. In most instances a 99% or 95% confidence interval is applied to experiments.

Image of confidence interval at 95% level

Resources:

Conversion marketing – Glossary of Conversion Marketing.

Over 300 tools reviewed – Digital Marketing Toolbox.

A/B testing tools – Which A/B testing tool should you choose?

Digital Marketing and Insight