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Re: Problem with Distribution Functions

  • To: mathgroup at smc.vnet.net
  • Subject: [mg84856] Re: Problem with Distribution Functions
  • From: "Stratocaster" <stotz1 at verizon.net>
  • Date: Wed, 16 Jan 2008 23:05:16 -0500 (EST)
  • References: <fmfibi$las$1@smc.vnet.net>

"Stephan Heckmueller" <stephan.heckmueller at gmx.net> wrote in message 
news:fmfibi$las$1 at smc.vnet.net...
> Hello,
> I have a little problem with Mathematica's statistical
> distributions. These seem not to be evauluated properly.
> For example the documentation says that
> Variance[GammaDistribution[a,b]] should be evaluated to
> ab^2. In my worksheets I simply get:
> Variance[GammaDistribution[a,b]]. There are no errors
> or warnings whatsoever.
>
> Is there some package missing do I have to call the
> needs function in advance?
>
> Thanks.
>

Yes.

<<Statistics`ContinuousDistributions`



Load that-then try it.


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