TransformedDistribution -- odd problem

*To*: mathgroup at smc.vnet.net*Subject*: [mg120465] TransformedDistribution -- odd problem*From*: paulvonhippel at yahoo <paulvonhippel at yahoo.com>*Date*: Sun, 24 Jul 2011 03:19:57 -0400 (EDT)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com

I'm having a very strange problem with TransformedDistribution, where I can calculate the mean of an F distribution but I cannot calculate the mean of a constant multiplied by an F distribution. That is, if I type Mean[TransformedDistribution[F, F \[Distributed] FRatioDistribution[v, v]]] Mathematica gives me an answer. But if I type Mean[TransformedDistribution[k*F , F \[Distributed] FRatioDistribution[v, v]]] Mathematica just echoes the input. I swear I got an answer for the second expression earlier today. What am I doing wrong?