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Math Help - How to find residual?

  1. #1
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    Question How to find residual?

    what do they mean by residual(y value above minus equation y value. when
    1. x is 0.5 and y is 1.6
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by nppatel4428 View Post
    what do they mean by residual(y value above minus equation y value. when
    1. x is 0.5 and y is 1.6
    The residual in a regression model is the difference between the observed and the predicted y for some x ( y the dependent variable and x the independent variable).

    So if we have a model y=a x + b, and a data point (x_i,y_i) the residual is for this point is:

    r_i=y_i - (a x_i + b)

    RonL
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