
Is there a reason why weighting an analysis would produce different results
when generating ANOVA using just the oneway ANOVA versus the general
linear model ANOVA?
When I run a oneway ANOVA (weights are applied), it produced a sample size
of 188 for group A and 1272 for group B (see syntax below).
ONEWAY
outcome BY group
/STATISTICS DESCRIPTIVES
/MISSING ANALYSIS .
I then ran ANOVA using the general linear model (weights are applied) and
it produced a sample size of 2 for group A and 208 for group B (see
respective syntax below).
UNIANOVA
outcome BY group
/METHOD = SSTYPE(3)
/INTERCEPT = INCLUDE
/PRINT = DESCRIPTIVE
/CRITERIA = ALPHA(.05)
/DESIGN = group .
Any thoughts on what may be causing the differences in sample sizes?
Thanks in advance.
