Results 1 to 6 of 6

Math Help - show that R square is zero

  1. #1
    Senior Member
    Joined
    Jan 2010
    Posts
    273

    show that R square is zero

    A two-variable regression with no intercept is given as:

    Y_i=B_2X_i+u_i


    Show that the R-squared ( R^2) for this model is equal to zero.



    I think I should show that the covariance of X and Y are zero?
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    Joined
    Sep 2012
    From
    Australia
    Posts
    3,849
    Thanks
    680

    Re: show that R square is zero

    Hey wopashui.

    There are quite a few formulas for R^2 and covariance would indeed be one way to show this.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Senior Member
    Joined
    Jan 2010
    Posts
    273

    Re: show that R square is zero

    Quote Originally Posted by chiro View Post
    Hey wopashui.

    There are quite a few formulas for R^2 and covariance would indeed be one way to show this.
    I can't end up getting zero by using the covariance, can you show me some steps of approaching this?
    Follow Math Help Forum on Facebook and Google+

  4. #4
    MHF Contributor
    Joined
    Sep 2012
    From
    Australia
    Posts
    3,849
    Thanks
    680

    Re: show that R square is zero

    What information do you have about the model and its constraints?
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Newbie
    Joined
    Nov 2012
    From
    canada
    Posts
    1

    Re: show that R square is zero

    Econ 4706?
    Follow Math Help Forum on Facebook and Google+

  6. #6
    MHF Contributor
    Joined
    Sep 2012
    From
    Australia
    Posts
    3,849
    Thanks
    680

    Re: show that R square is zero

    No I mean the actual course material you are covering (specific topics, concepts, stuff like that).

    I have no idea what that course is.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 10
    Last Post: October 22nd 2012, 05:21 PM
  2. Replies: 1
    Last Post: September 14th 2010, 10:48 AM
  3. Replies: 4
    Last Post: July 5th 2009, 03:00 AM
  4. show any square matrix in C has at least one eigenvalue
    Posted in the Advanced Algebra Forum
    Replies: 1
    Last Post: January 17th 2009, 06:55 PM
  5. Show subspace Ua = span {a} is square on hyperplane H
    Posted in the Advanced Algebra Forum
    Replies: 0
    Last Post: September 22nd 2007, 06:53 AM

Search Tags


/mathhelpforum @mathhelpforum