Medium
Effect Sizes
SPSS
Free
A one-way ANOVA compares three teaching methods (A, B, C) on exam scores. SPSS output shows: F(2, 57) = 4.80, p = .012, and Partial Eta Squared = .144. Which interpretation is MOST accurate?
A
The effect is statistically significant, and about 14.4% of the variance in exam scores is explained by teaching method (in this model).
B
Because p < .05, the effect size is large by default and we don’t need Partial Eta Squared.
C
Partial eta squared of .144 means the mean exam score increased by 14.4 points due to teaching method.
D
Partial eta squared of .144 means that 14.4% of students improved their scores due to teaching method.