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chico_garcia

Chile
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Posted - 10/06/2006 :  4:03:30 PM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
I need to know how does the origin calculate the standard error of the slope when you perform a linear fit?????

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larry_lan

China
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Posted - 10/07/2006 :  9:44:14 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi:

To know the standard error of the given linear model:

we will firstly calculate the residual sum of square (RSS):

And get the sample variance:

Then the standard error of regression coefficients can be obtained by:

and

where n is the number of samples and SXX is:


Larry
OriginLab Technical Services

Edited by - larry_lan on 10/07/2006 9:45:47 PM
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