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ruskicar
ruskicar
Level III

Adding standard deviation to Y in Fit Model platform

Created: Dec 14, 2021 07:58 AM  |  Last Modified: Jun 8, 2023 5:43 PM (1097 views)

Hi,

I want to include the standard error (1sigma) to Y measurements in Fit Model platform. Is this possible? I was thinking of including them in the Weight column, but I am not sure how to transform standard deviations to weights. I know in Mathematica, when using NonlinearModelFit, the standard deviation can be added as Weights = 1/deltaY^2, where deltaY is the measurement error. Is this similar in JMP?

Thanks

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2 REPLIES 2
Mark_Bailey
Staff Mark_Bailey
Staff

Re: Adding standard deviation to Y in Fit Model platform

Dec 14, 2021 09:13 AM (1084 views)  |  Posted in reply to message from ruskicar 12-14-2021

So by saying "want to include the standard error to Y measurements," you mean you want to weight the observations with the reciprocal SD squared? I would create a new data column to record the associated measurement error and then use another data column with a formula to compute the weight. You can verify the correct SE this way.

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ruskicar
ruskicar
Level III

Re: Adding standard deviation to Y in Fit Model platform

Dec 14, 2021 04:50 PM (1060 views)  |  Posted in reply to message from Mark_Bailey 12-14-2021

Indeed, I was just wondering if the reciprocal SD squared is a good measure for Weight. Thanks for your answer.

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