Notices
Results 1 to 4 of 4

Thread: what does p(x,y) mean?

  1. #1 what does p(x,y) mean? 
    Forum Freshman
    Join Date
    Jul 2013
    Posts
    14
    p(x,y) where X and Y are random variables. does that mean P(X and Y)? I don't think it's the case, because of the comma, but I don't understand what it may mean. X denotes the number of balls caught in 3 attempts Y denotes the number of balls caught in 4 attempts


    Reply With Quote  
     

  2.  

    Related Discussions:

     

  3. #2  
    Forum Freshman
    Join Date
    Jul 2013
    Posts
    14
    if p(x) and p(y) are binomial distribution functions, how do you compute p(x,y)?


    Reply With Quote  
     

  4. #3  
    KJW
    KJW is online now
    Forum Professor
    Join Date
    Jun 2013
    Posts
    1,475
    Quote Originally Posted by EdmureTully View Post
    p(x,y) where X and Y are random variables. does that mean P(X and Y)? I don't think it's the case, because of the comma, but I don't understand what it may mean. X denotes the number of balls caught in 3 attempts Y denotes the number of balls caught in 4 attempts
    I take p(x,y) to be a probability density function over two independent variables. Thus, in a way it does mean P(X and Y). That is, the probability of:


    (x < X < x+dx) AND (y < Y < y+dy) is p(x,y) dx dy.
    There are no paradoxes in relativity, just people's misunderstandings of it.
    Reply With Quote  
     

  5. #4  
    Forum Ph.D. merumario's Avatar
    Join Date
    Nov 2012
    Location
    nigeria
    Posts
    844
    P(x,y) Is the probability of having an outcome of 2 independent events. ie the probability of catching a ball after 3attempts,and the probability of catching a ball after 4attempts. Which i think should be 1/3 and 1/4 respectively.
    "I am sorry for making this letter longer than usual.I actually lacked the time to make it shorter."###
    Reply With Quote  
     

Bookmarks
Bookmarks
Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •