Dear Aca,
reading my previous answer I notice that I overlooked that you are dealing
with a survival analysis issue. Obviously, I agree in full with Maarten's
advice about first -stset- your data. In addition, I feel a little queasy
about both ANOVA and Kruskal-Wallis role in this context: for instance, as
far as non parametric tests are concerned, - sts test - is probably the way
to go.
Kind Regards,
Carlo
-----Messaggio originale-----
Da: [email protected]
[mailto:[email protected]] Per conto di Carlo Lazzaro
Inviato: venerdì 31 ottobre 2008 9.20
A: [email protected]
Cc: 'Aca N.T.'
Oggetto: st: R: Kruskal-Wallis equivalent for survey data with pweight
Dear Aca,
why don't perform bootstrap ANOVA test in oeder to allo for the skewed
distribution of the response variable?
Kind Regards,
Carlo
-----Messaggio originale-----
Da: [email protected]
[mailto:[email protected]] Per conto di Aca N.T.
Inviato: venerdì 31 ottobre 2008 6.38
A: [email protected]
Oggetto: st: Kruskal-Wallis equivalent for survey data with pweight
I have a simple question about testing length of stay (LOS)
differences among 5 groups. The response variable (LOS) has a skewed
distribution. I have previously transformed the LOS (log
transformation) and tried parametric statistic (ANOVA using
svy:regress), but not happy when performing back-transformation for
SD/SE. I rarely used non-parametric statistics before even for
non-survey data, so really this issue is a hassle for me. I believe,
however, that Stata has a test equivalent to Kruskal-Wallis for survey
data.
Any suggestions?
Thank you,
Aca
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