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This example appears in the Accelerated Life Testing Data Analysis Reference book.


Consider the following times-to-failure data at two different stress levels.

Pdf of the lognormal distribution with different log-std values.


The data set was analyzed jointly in an ALTA standard folio using the IPL-Weibull relationship model, with a complete MLE solution over the entire data set. The analysis yields:

[math]\displaystyle{ \widehat{\beta }=2.616464 }[/math]
[math]\displaystyle{ \widehat{K}=0.001022 }[/math]
[math]\displaystyle{ \widehat{n}=1.327292 }[/math]