Need to calculate tolerance Intervals with a set of non-normal data and 3-Parameter Weibull distribution

#1
Hi,

I need to calculate tolerance Intervals with a set of non-normal data and 3-Parameter Weibull distribution (only distribution that fits my data), but the "3-parameter Weibull" is not listed as an option, what I can do, what do you recommend to use instead, Weibull or Non-Parametric option?.

I appreciate any help you can provide.
 
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