Results 1 to 6 of 6

Math Help - expected value of matrices

  1. #1
    Junior Member
    Joined
    Feb 2009
    Posts
    33

    expected value of matrices

    Dear all,

    Assume X= \left(\begin{array}{ccc}X_{11} & X_{12} & X_{13} \\ X_{21} & X_{22} & X_{23} \\ X_{31} & X_{32} & X_{33}\end{array}\right)

    How to find E(X)? where E is expected value.
    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 atlove View Post
    Dear all,

    Assume X= \left(\begin{array}{ccc}X_{11} & X_{12} & X_{13} \\ X_{21} & X_{22} & X_{23} \\ X_{31} & X_{32} & X_{33}\end{array}\right)

    How to find E(X)? where E is expected value.
    Read item 6 in this reference: Expected value - Wikipedia, the free encyclopedia
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Junior Member
    Joined
    Feb 2009
    Posts
    33
    Quote Originally Posted by mr fantastic View Post
    If one of the entry of E(X) is E(11), then what will be the value of E(11)?
    Follow Math Help Forum on Facebook and Google+

  4. #4
    MHF Contributor matheagle's Avatar
    Joined
    Feb 2009
    Posts
    2,763
    Thanks
    5
    Quote Originally Posted by atlove View Post
    If one of the entry of E(X) is E(11), then what will be the value of E(11)?
    Expected value of a constant is the constant.
    So, do you mean E(X) =11 ?
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Junior Member
    Joined
    Feb 2009
    Posts
    33
    Quote Originally Posted by matheagle View Post
    Expected value of a constant is the constant.
    So, do you mean E(X) =11 ?
    thank you~

    is there any meaning of the expected value of a constant?
    Follow Math Help Forum on Facebook and Google+

  6. #6
    Junior Member
    Joined
    Feb 2009
    Posts
    33
    Quote Originally Posted by matheagle View Post
    Expected value of a constant is the constant.
    So, do you mean E(X) =11 ?
    suppose all the entries in matrix X are const.
    if E(X)=X, then X-E(X)=0?
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 2
    Last Post: November 25th 2010, 07:34 PM
  2. Expected value/ st dev/var
    Posted in the Advanced Statistics Forum
    Replies: 3
    Last Post: September 30th 2010, 03:55 AM
  3. Total matrices and Commutative matrices in GL(r,Zn)
    Posted in the Advanced Algebra Forum
    Replies: 8
    Last Post: August 16th 2010, 03:11 AM
  4. Matrices represented by Symmetric/Skew Symmetric Matrices
    Posted in the Advanced Algebra Forum
    Replies: 7
    Last Post: October 25th 2008, 06:06 PM
  5. Expected value
    Posted in the Statistics Forum
    Replies: 9
    Last Post: August 20th 2008, 11:30 PM

Search Tags


/mathhelpforum @mathhelpforum