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Regression Co efficents

  • 13-11-2003 01:08AM
    #1
    MR DAZ
    Registered Users, Registered Users 2 Posts: 799 ✭✭✭


    Hi Folks....

    I'm currently doing a distance learning couse through oscail....and i have an exam approaching fast.... :(

    My question is when you work out the regression co efficient

    using the formula below...what does the "a" represent?

    where "E" is the sum

    b = n Exy - Ex Ey
    2 2
    n Ex - ( Ex)

    _ _
    a = y - bx

    My apoligies for using "E" as the sum reprentation..

    Now I have worked out regression using the top formula ....but whats the story with the bottom formula?

    Thanks

    Darren


Comments

  • #2
    Capt'n Midnight
    Moderators, Recreation & Hobbies Moderators, Science, Health & Environment Moderators, Technology & Internet Moderators Posts: 96,050 Mod ✭✭✭✭Capt'n Midnight


    Tip
    Edit your post and add [php] at the start and [/php ] at the end.

    If it's the equation of a straight line then A is the value where you either the horizontal or vertical lines (ie x=0 or y=0)
    B would be the slope - depends on the angle of the line to the x or y axis


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