Re: Mathematica: Weibull distribution fnc.

*To*: mathgroup at smc.vnet.net*Subject*: [mg5377] Re: Mathematica: Weibull distribution fnc.*From*: axelrod at statwiz.com (Michael Axelrod)*Date*: Thu, 5 Dec 1996 14:50:18 -0500*Organization*: Statwiz*Sender*: owner-wri-mathgroup at wolfram.com

One uses all the distribution functions in Mathematica in pretty much the same way. You can calculate the density function or the cumulative distribution function at a point x by PDF[dist[args],x] or CDF[dist[args],x] where 'dist' a named distribution and 'args' determine the distribution. Usually 'args' will be a set of location- scale (mean standard deviation) parameters. Mathematica will also take moments. A good way to interpret what the args mean for a given dist such as the Weibull is to find the mean and variance with Mathematica-- Mean[WeibullDistribution[a,b]], Variance[WeibullDistribution[a,b]] then check with a statistics book to see how a and b relate to the mean and variance. Michael Axelrod In article <57648b$28t at dragonfly.wolfram.com>, Brian <riglinbd at ml.wpafb.af.mil> wrote: > I am trying to employ a Weibull distribution in one of the > notebooks I am working on. However, Mathematica provides > scant if any information on how to use this function. Could > some one with more experience than I please enlighten me as > to how the Weibull distribution function found in the > Statistics'ContinuousDistribution package is used. > > Thank you, > Brian Rigling