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Old June 7th, 2017, 08:47 AM
Michael1408 Michael1408 is offline
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Default Weibull analysis of the population?

I got myself confused and I was hoping someone could 'unconfuse' me

I have failure/survival data for an entire population and I am tasked on creating a vba code that would analyze the data for warranty prediction purposes

1. From what I know, a weibull analysis is performed on a samples under test not the entire population, calculating the median rank would require an assumption for the confidence level. Correct me I am wrong, but confidence level is used for samples statistics and makes no sense to use on for population, correct?

2. Do I exclude units failing at Time = 0? feels like they should be included

3. If data shows a couple of units failing at the same exact time, do they get the same order number for median rank calculations?

Last edited by Michael1408; June 7th, 2017 at 09:04 AM.
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