Confidence intervals are a standard output of many free and paid A/B testing tools. Most A/B test reports contain one or more interval estimates. Even if you’re simply a consumer of such reports, ...

Journal of the American Statistical Association, Vol. 66, No. 335 (Sep., 1971), pp. 609-613 (5 pages) ...

Confidence intervals and hypothesis tests are directly linked. Confidence intervals can be used to check the reasonableness of claims about the parameter. If someone claims the parameter is equal to ...

Editor’s note: Robert J. Moore is the co-founder of RJMetrics, a company whose software helps online businesses make smarter decisions using their own data. He also previously served on the Investment ...

Christina Majaski writes and edits finance, credit cards, and travel content. She has 14+ years of experience with print and digital publications. Khadija Khartit is a strategy, investment, and ...