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Thread: Cook's Distance

  1. #1
    Mar 2006

    Cook's Distance


    I have a little question, I ran a linear regression model, and got the following diagnostic plots from R (attached photo). It's crystal clear that observation 35 is an outlier, but I somehow fail to understand the last graph, how can I read the cook distance of this observation, what are these red lines for ?

    can anyone help interpreting the graph ?

    In case I am not clear, I do know what Cook's distance means, I just can't understand that graph, what is the Cook's distance of observation 35 and how do I read it ?

    Thank You !
    Attached Thumbnails Attached Thumbnails Cook's Distance-reg-ols-outliers.gif  
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