in order to validate the coefficients I have found for my sample of
175 items I want to run a routine that
a) draws subsamples of 50 items, computes the coeffcients for a linear
regression with 12 x's
b) saves the coefficients, i.e. adds them to the previously found
c) quits after , say, 20 runs,
and finally computes the mean for each coefficient.
the idea behind this is that if the mean is more or less equal to
coefficient for the whole sample, the coefficient can be assumed to be
"correct" in general.
does anyone have any clue how to do this in SPSS ?