Rachele reported to me privately that she had trouble with the example
I sent below, and to my shame I have to admit that I did not run this
example before sending it to the list.
First of all it contains an error: all the -adjust- commands should
happen immediately after the -anova- command, in other words the -mean-
command should have been placed either before -anova- or after the last
-adjust- command.
Second, the code for the overal mean adjusted for wei still doesn't
work, and I don't understand why. I expected that this code:
sysuse auto, clear
recode rep78 1/2 = 3
anova mpg rep78 wei, continuous(wei)
adjust wei, se ci
would give me a mean of mpg adjusted for wei (with standard error and
confidence interval), but instead it gives me an empty table. Does
anyone have any thoughts on this one?
-- Maarten
> --- Rachele Capocchi <[email protected]> wrote:
> > I have calculated the adjusted means with Anova command:
> > I need the all mean, which is the command ?
> > I need the IC and SD of the adjusted means, how can I calculate
> > them ?
--- Maarten buis <[email protected]> wrote:
> *--------------- begin example -------------
> sysuse auto, clear
> recode rep78 1/2 = 3
> anova mpg rep78 wei, continuous(wei)
>
> /* overall mean */
> mean mpg if e(sample)
>
> /* mean adjusted for wei */
> /* with se and ci */
> adjust wei, se ci
>
> /* conditional means adjusted for wei */
> /* with se and ci */
> adjust wei, by(rep78) se ci
> *--------------- end example -----------------
-----------------------------------------
Maarten L. Buis
Department of Social Research Methodology
Vrije Universiteit Amsterdam
Boelelaan 1081
1081 HV Amsterdam
The Netherlands
visiting address:
Buitenveldertselaan 3 (Metropolitan), room Z434
+31 20 5986715
http://home.fsw.vu.nl/m.buis/
-----------------------------------------
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