ANOVA and ANCOVA

Question 1

ANOVA

Answer 1

used to compare three or more mean scores (statistically significant ANOVA means that the means are not equal and differences exist somewhere)

Question 2

what tests are used to determine where differences in means occur (ANOVA)

Answer 2

Turkey-HSD post-hoc ( between groups
Bonferroni post-hoc (repeated measures)

Question 3

What assumptions do we test for?

Answer 3

Homogeneity of variance (if variance in scores is same for all groups)

Question 4

ANCOVA

Answer 4

test for mean differences between groups while controlling for covariates (effect of the covariate on depression variable is removed and then group difference is tested)

Question 5

What are assumptions of ANCOVA

Answer 5

1. Measurement
2. reliability
3. multicollinearity
4. linearity
5. homogeneity of regression slopes