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high p-value of constant in regression

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  • #24116

    lost123
    Participant

    When i run a multiple linear regression, i get very low p-values for most of the indipendent variables and for the model as a whole. BUT i get get very high p-values for the constant. I read in this forum what causes this. Now my question is: How does it influence the results of my tests and How can it be corrected?
    Thanks for any help,
    N

    0
    #57752

    Allard Munters
    Participant

    Which software are you using? If you’re using Minitab, there is a possibility (via the options button), to remove the constant from the model byΒ unchecking “fit intercept”.
    Allard

    0
    #57753

    Remi
    Participant

    Hai lost123,
    remember: for predictions of Regression it is recommended to only interpolate (i.e. only make predictions in the area where you have data).
    The high p-value of the constant says nothing else than that your prediction around the origin will be ‘bad’.
    You can correctΒ this by extending your data collection to the area around the origin.
    Remi

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