Results 1 to 2 of 2

Math Help - The joint probability function of two random variables X and Y is given....

  1. #1
    Newbie
    Joined
    Nov 2010
    Posts
    3

    Post The joint probability function of two random variables X and Y is given....

    Hi Guys, Im new on here and I need some help. I have been asked this question and i have no idea where to start. Any help would be appreciated.



    The joint probability function of two random variables X and Y is given by the following table:

    The joint probability function of two random variables X and Y is given....-testttttt.png


    Question 1 : Find the marginal probability function for X.(a) -1, (b) 0, (c) 1.

    Question 2 : Find the marginal probability function for Y.(a) -1, (b) 0, (c) 1.

    Question 3 : What is the conditional probability that X=1 given that Y=0?

    Question 4 : Calculate the mean and variance of X.

    Question 5 : Calculate the mean and variance of Y.

    Question 6 : Calculate the covariance between X and Y.

    Question 7 : Find the correlation between X and Y.

    Question 8 : Are X and Y independent?

    Thanks!
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Flow Master
    mr fantastic's Avatar
    Joined
    Dec 2007
    From
    Zeitgeist
    Posts
    16,948
    Thanks
    5
    Quote Originally Posted by ASIWYFA View Post
    Hi Guys, Im new on here and I need some help. I have been asked this question and i have no idea where to start. Any help would be appreciated.



    The joint probability function of two random variables X and Y is given by the following table:


    Click image for larger version. 

Name:	testttttt.png 
Views:	143 
Size:	1.8 KB 
ID:	19561




    Question 1 : Find the marginal probability function for X.(a) -1, (b) 0, (c) 1.

    Question 2 : Find the marginal probability function for Y.(a) -1, (b) 0, (c) 1.

    Question 3 : What is the conditional probability that X=1 given that Y=0?

    Question 4 : Calculate the mean and variance of X.

    Question 5 : Calculate the mean and variance of Y.

    Question 6 : Calculate the covariance between X and Y.

    Question 7 : Find the correlation between X and Y.

    Question 8 : Are X and Y independent?

    Thanks!
    If you search this subforum you will find similar questions. Does your textbook or class notes have a similar example? What have you tried? Where are you stuck?
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Conditional probability of joint geometric random variables
    Posted in the Advanced Statistics Forum
    Replies: 5
    Last Post: December 5th 2011, 09:28 PM
  2. three i.i.d. Gaussian random variables - joint pdf
    Posted in the Advanced Statistics Forum
    Replies: 3
    Last Post: November 13th 2011, 07:34 AM
  3. Replies: 3
    Last Post: August 13th 2011, 01:10 PM
  4. Joint PGF of two non-independent random variables.
    Posted in the Advanced Statistics Forum
    Replies: 1
    Last Post: August 22nd 2009, 11:03 PM
  5. Replies: 1
    Last Post: April 24th 2008, 12:41 PM

Search Tags


/mathhelpforum @mathhelpforum