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Thread: Predicted Probability

  1. #1
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    Smile Predicted Probability




    Someone created a spreadsheet to graph predicted provability values on a Logistic Regression S Graph. There are four values used.

    a = Assumed Maximum
    b = Assumed Minimum
    c = Raw Data St. Dev (Field Data)
    d = Model Output (Research Data)

    the formula used if the following

    NORMSDIST (a-d) / (((c^2)+(b^2))^0.5)

    Wondering why the data is being manipulated by the formula & what is accomplishing

    Any help will be greatly appreciated. I can provide more detail if required
    Cheers
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    Re: Predicted Probability

    Interesting, no idea offhand. Do you have a link to the source?
    Stop cowardice, ban guns!

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    Re: Predicted Probability


    hlsmith,

    Thanks for replying to my post... ... I'll try to simplify/clean-up the spreadsheet I have & post it. In the mean time, the attached equation might be a bit easier to understand?
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