one way anova and t tests Flashcards
1
Q
omega squared formula for one way anova
A
w^2= (SSM-dfMxMSR) / (SST +MSR)
2
Q
omega squared interpretations
A
tells us the proportion in the dependent variable (outcome) that is explain by the Independent variable (treatment)
Explained variation/total variation
unbiased, report even if it is negative?
3
Q
omega squared effect sizes
A
.01=small
.06=medium
.14=large
4
Q
when are t tests and one way ANOVA equivalent
A
with only two groups
in that case, F=t^2
5
Q
when do we use one way ANOVA
A
when we have one factor but want to compare more than two means
6
Q
when do we use a one way t test
A
when we only have one mean
