InverseWeibull Command

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InverseWeibull( <Shape>, <Scale>, <Probability> )
Computes the inverse of cumulative distribution function of Weibull distribution at p, where the Weibull distribution is given by shape parameter k and scale parameter λ.
In other words, finds t such that P(X ≤ t) = p, where X is random variable with Weibull distribution.
Probability p must be from [0,1].
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