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From: Philip Bracken on 3 Feb 2010 13:43
Hi All,

I may be off base, but I can't seem to find what regression method is
used in computing a 'quadratic' regression using REGSTATS (is it a
least-squares regression?).

I've used this program to run a regression on a data set with two weak
predictors, and am happy with the agreement, but need to define what
method was used before I can be comfortable with my predictions.

Thanks in advance,
Phil
From: Tom Lane on 3 Feb 2010 15:41
> I may be off base, but I can't seem to find what regression method is
> used in computing a 'quadratic' regression using REGSTATS (is it a
> least-squares regression?).

Phil, yes it is least squares, just with additional columns representing the
interaction and squared values of the input data matrix.

-- Tom


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