When interpreting F_(2,27) = 8.80,p < 0.05,what is the within-groups df?

A) 30
B) 27
C) 3
D) 2

The within-groups df is equal to the total number of participants minus the number of groups. In this case, there are 30 total participants (from the subscript 30 in F_{), and two groups (from the subscript 2 in F). Therefore, the within-groups df is 30 - 2 = 28. However, the p-value is less than 0.05, which means there was a significant difference between the groups. Therefore, the interpretation of this output would require additional information, such as the specific post-hoc tests used or the effect size.}