Hi Woo Suk, Tae
> I have one normal group and 2 subtype (not paired) of one disease (total 3 groups).
> I'd like to know what is more accurate statistical test between
> independent t-test or anova.
It's not a question of accuracy, but rather of what hypothesis you
wish to test. If you have regressors for [normal disease1 disease2],
then you could use t-contrasts to test e.g.
* normal > disease1 [1 -1 0]
* normal > average disease [2 -1 -1]
or an F-contrast to test e.g.
* all groups different ("main effect" of group factor)
[1 -1 0
0 1 -1]
Hope that helps,
Ged.
|