Results 1 to 3 of 3

Math Help - Conditional probablity mass function problem -- need help please!

  1. #1
    Newbie
    Joined
    Jan 2011
    Posts
    5

    Conditional probablity mass function problem -- need help please!

    Suppose that the random variables X and T have the joint probability mass function

    p(x,t) = P(X=x, T=t) = p^2(1 p)^t-2, t = x+1, x+2,иии, x = 1,иии,t 1,
    where 0 < p < 1.

    Find the marginal probability mass function of T.


    I really have no clue how to do this question
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor matheagle's Avatar
    Joined
    Feb 2009
    Posts
    2,763
    Thanks
    5
    to get the marginal of T, you need to sum over x.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    MHF Contributor matheagle's Avatar
    Joined
    Feb 2009
    Posts
    2,763
    Thanks
    5
    I started working on this and I have a feeling the distribution is incorrect.
    Don't you need an x somewhere in this???
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Beginning Probablity Problem
    Posted in the Statistics Forum
    Replies: 2
    Last Post: February 2nd 2011, 08:17 PM
  2. Probablity Problem
    Posted in the Advanced Statistics Forum
    Replies: 1
    Last Post: June 20th 2010, 05:25 PM
  3. Zany probablity problem.....
    Posted in the Advanced Statistics Forum
    Replies: 3
    Last Post: February 11th 2009, 09:37 AM
  4. Conditional Probablity Problem
    Posted in the Statistics Forum
    Replies: 2
    Last Post: October 19th 2008, 02:33 PM
  5. conditional probablity
    Posted in the Statistics Forum
    Replies: 3
    Last Post: September 23rd 2007, 04:27 PM

Search Tags


/mathhelpforum @mathhelpforum