I got this result in cumulative damage step stress - is b1 a threshold?
Hi @StatsHeadache : this may be of some help.
https://www.jmp.com/support/help/en/17.2/index.shtml#page/jmp/cumulative-damage-platform-options.shtml
In particular:
Also see here: https://www.jmp.com/support/help/en/17.2/index.shtml#page/jmp/statistical-details-for-distributions-2.shtml#ww1553215
Ok wait, maybe yes! looks like the equation below matches and X is number of events? creating mu, which would be eta in the weibull distribution?
Try going to the Tools and clicking on the "?" and then click on the table and it will display the help page for the report table.
Are you using an Arrhenius transform? I think b0 and b1 are the intercept and slope for the linearization of the Alpha parameter of the Weibull distribution.
No its a linear prediction
OK thats the best answer, but the slope is usually Beta, and perhaps intercept can be interpreted as threshold - that would work, that leave Eta usually described as scale factor as negative, which isn't possible.
Which leaves my best guess as:
b0 = eta
b1 = threshold (lambda)
beta = beta (slope)
X is your acceleration factor, e.g. temperature, voltage, etc.
If your "eta" is "alpha" on this page Statistical Details for Distributions , then exp(mu) is your "eta".
