Abstract
New developments in statistical inference for the two parameter Weibull distribution are explained in the terminology of bearing endurance testing. Specifically the developments are: 1. Procedures for conducting an exact test of whether the Weibull shape parameter and a percentile, such as the L10 life, differs significantly among κ (2≤κ≤10) groups of censored life test results. These procedures have application in the very common circumstance wherein one wishes to evaluate the effect of several levels of a design or environmental variable upon fatigue life. Given the results of a censored life test conducted at each level of the variable, it is necessary to decide whether the observed differences in life are real or are explainable by random variation. 2. Procedures for setting confidence limits on the shape parameter and the L10 life of a Weibull distributed failure mode when observations are censored through the failure of the bearing by means of another competing failure mode. These procedures have ap...
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