Possibly Silly Question on Manipulating Statistical Distributions
- To: mathgroup at smc.vnet.net
- Subject: [mg9352] Possibly Silly Question on Manipulating Statistical Distributions
- From: Luci Ellis <elisha at dot.net.au>
- Date: Sat, 1 Nov 1997 03:33:38 -0500
- Sender: owner-wri-mathgroup at wolfram.com
I would like to plot the PDFs and CDFs of random variables, where said r.v.'s are combinations of other random variables with known, standard distributions. Defining a distribution like: xdist = PoissonDistribution[10] ydist = NormalDistribution[0,1] zdist = NormalDistribution[0,2] Then: wdist = ydist + zdist udist = xdist * ydist return: PoissonDistribution[10]*NormalDistribution[0,1] or NormalDistribution[0,1]+NormalDistribution[0,2] as expected. But good luck trying to plot these beasties' PDFs. I know you can't just add the PDFs or anything crazy like that. Is there a way to get these distributions without doing multiple samples from the distribution and building it up empirically? Am I missing something? Thanks in advance, Luci -------------- Luci Ellis: elisha at dot.net.au http://www.dot.net.au/~elisha