Statistical Methods in Reliability

Defective Subpopulation Distributions

Defective subpopulation distributions, sometimes known as limited failure populations, arise when only a fraction of units are subject to some kind of an event. A flatting of points on a probability plot may imply a defective subpopulation. For subpopulations, it is important to test long enough to provide data that will be sufficient to decide if you have many units failing slowly or a small fraction failing rapidly.

In cases where there is a huge difference between the Wald and the Likelihood-ratio based confidence interval, choose the likelihood interval. View a video on this topic by Bill Meeker and a related JMP demo by Leo Wright.

This webinar is part of the Statistical Methods for Reliability on-demand webinar series.

Register now for this free Webinar.

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  Yes, you may send me emails occasionally about JMP products and services. I understand that I can withdraw my consent at any time by clicking the opt-out link in the emails.

JMP Statistical Discovery LLC. Your information will be handled in accordance with our Privacy Statement.