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st: 3 very basic questions
I'm a recent convert from SPSS (hence "statsdummy"). I'm having
trouble making the adjustment. Here are three things I'd like to do,
but am having difficulty doing (even after scouring the documentation
& on-line discussions):
1. Normalize my data. I'd like to set the mean to zero and the SD to 1
for most of my variables. Is there a simple way to do this?
2. Develop a regression model in a series of steps, noting the change
in R2 that the addition of each new set of IVs produces and whether
that change is significant (especially useful in assessing the
significance of interactions). For other refugees from SPSS, this
would be akin to:
/STATISTICS = CHA
/METHOD=ENTER x1 x2 x3
/METHOD=ENTER x12 x13 x23
/METHOD=ENTER x123 .
3. Perform the same transformation on a series of variables without
repeating the command. For other refugees from SPSS, this would be
RECODE v1 v2 v3 INTO v11 v22 v33 .
Thanks in advance for any help!
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