References for methods?

2019 2 25
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更新时间：2019 2 26
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Older versions of the documentation had references to methods used. Is this information now hidden somewhere? I am particularly interested in references describing curve fitting and confidence intervals for fitted parameters.

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Walter Roberson
Walter Roberson 2019-2-25
% Covariance matrix of fitted parameters is
% V = inv(X'*X) * (sse/dfe)
% and the confidence intervals are
% b +/- sqrt(diag(V)) * tinv(1-(1-level)/2, dfe)
See toolbox/curvefit/curvefit/@cfit/confint.m
Stephen
Stephen 2019-2-26
I was hoping for a reference to a paper or a book where this formula is derived.
Walter Roberson
Walter Roberson 2019-2-26
There is a different phrasing over at stackexchange but it does not give a reference.

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