Weibull questions

[Kamil Toth <kamiltoth@yahoo.com>]

Folks:

I have several questions regarding the Weibull distribution and its implementation in S+

 

1. There are known two analytical forms of Weibull distribution.

 Which form exactly is  implemented in S+ and what is the meaning of the parameter "scale" in this form?

 

2. What would be the best method to fit the Weibull distribution? I am trying to avoid the method of moments, however I was not able to obtain a fast result with the max likelihood either.

 

3. What is the method for generating Weibull-distributed random numbers?

 

Thank you

 

Kamil Toth

Ecole Normale Superierre

Paris, France

 

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