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I am trying to fit a polynomial function by least square method and I want to know the uncertainty on my fitting parameters. In which book can I find a clear answer?

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This is off topic here, but you can check at Cross Validated and see if it's already been asked there. (I suspect it has.) – David Zaslavsky♦ Jun 21 '12 at 22:10
I've got C++ code that does this, and I'd be happy for you to grab a copy if you want. Comment here if you want a copy and I'll post the URL. – John Rennie Jun 22 '12 at 7:16

closed as off topic by David Zaslavsky♦ Jun 21 '12 at 22:09

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