Dear colleagues, I used a Weibull distribution equation extracted from Sigmaplot. It fits very well into my data but I have doubts about what are the shape, location and scale parameters, as well as where Sigmaplot has extracted it from (reference). The equation used to fit the data is:
f(x)=0 if x
Vitor Hugo Moreau Cunha
Basic Concepts: In life data analysis (also called "Weibull analysis"), the practitioner attempts to make predictions about the life of all products in the population by fitting a statistical distribution to life data from a representative sample of units.
The parameterized distribution for the data set can then be used to estimate important life characteristics of the product such as reliability or probability of failure at a specific time, the mean life and the failure rate
Failure parameter F(t) = 1- R(t)
Reliability R(t) = 1-F(t)
β - shape parameter (Weibull slope)
η - scale parameter (characteristic life)
γ - location parameter
t - time
note: please find the equation attached
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