Intervals & Tests
(beta risk). Probability that on a given sample, the test will fail to detect a real difference.
On a control chart, for example, the failure to detect a process shift equal to the amount of concern when a shift has actually occurred.
Learn more about the Statistical Inference tools for understanding statistics in Six Sigma Demystified (2011, McGraw-Hill) by Paul Keller, in his online Intro. to Statistics short course (only $89) or his online Black Belt certification training course ($875).