Results 1 to 3 of 3

Math Help - Problem concerning Marginal Density function

  1. #1
    Newbie
    Joined
    Feb 2010
    From
    Montreal
    Posts
    11

    Problem concerning Marginal Density function

    I've been stuck on an assignment question for hours and I could use a little help.

    The question is this:
    ------------------
    Given:
    f(x,y) = x + y for 0 <= x, y <= 1
    0 otherwise

    Find the marginal densities of X and Y.
    ------------------

    My understanding is that the mdf f(x) is the integral of f(x,y) for all values of y. In this case, that's the integral of f(x,y) from -infinity to 1. However when I take the definite integral it goes to infinity. The same goes for the mdf f(y).

    So, if somebody could offer some guidance I would be grateful.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Newbie
    Joined
    Feb 2010
    Posts
    11
    I think that what the problem says is that both x and y are in the interval [0,1]
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Feb 2010
    From
    Montreal
    Posts
    11
    Wow, aren't I embarrassed. Thanks though, I would have never realized that on my own.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. marginal density..and other..
    Posted in the Advanced Statistics Forum
    Replies: 2
    Last Post: August 31st 2009, 06:13 PM
  2. marginal probability density function
    Posted in the Advanced Statistics Forum
    Replies: 7
    Last Post: March 17th 2009, 01:04 PM
  3. marginal density function
    Posted in the Advanced Statistics Forum
    Replies: 0
    Last Post: January 20th 2009, 04:23 PM
  4. bivariate marginal density function
    Posted in the Advanced Statistics Forum
    Replies: 1
    Last Post: April 8th 2008, 06:23 AM
  5. marginal density, conditional density, and probability
    Posted in the Advanced Statistics Forum
    Replies: 1
    Last Post: March 24th 2008, 07:50 PM

Search Tags


/mathhelpforum @mathhelpforum