Pymc3: documentaion on Weibull distribution contains a mistake

[aakhmetz]

I am sorry, but I think the variance of Weibull distribution shown in https://docs.pymc.io/api/distributions/continuous.html#pymc3.distributions.continuous.Weibull is simply wrong. It does not equal to \beta^2\Gamma(1+2/\alpha-\mu^2), but \beta^2(\Gamma(1+2/\alpha)-\mu^2/\beta^2). At least, the Wikipedia page on Weibull distirubution confirms my guess

[chang111]

well, I think you are right. Let me to make a pr to fix it.

[aakhmetz]

@chang111 Because it is on the same page, you could also remove an unnessary closing bracket in the denominator of the p.d.f. of Wald distribution (just after \pi)

[chang111]

Good advice!

[aakhmetz]

Thanks!