Easy
Post-hoc Tests
Free
A researcher runs a one-way ANOVA to compare mean exam scores across 4 teaching methods (A, B, C, D). The ANOVA is significant (p < .05). What is the main purpose of running a post-hoc test next?
A
To find out which specific pairs of teaching methods differ while controlling for Type I error across multiple comparisons
B
To test whether the overall ANOVA F-statistic was calculated correctly
C
To increase the sample size so the ANOVA becomes more powerful
D
To test whether the dependent variable is normally distributed