Hello. I need some help trying to figure out the formula to calculate degrees of freedom for a statistics class.

Here is the actual question: " Calculate degrees of freedom (dfBG and dfE)."

I do know that the dfBG (BG being between groups) is 3, and the dfE is 72.

here is a text version of the information:

ANOVA

ControlScore

Sum of Squares df Mean Square F Sig.

Between Groups 25254.061 3 8418.020 45.491 .000

Within Groups 13323.553 72 185.049

Total 38577.614 75

** There are 4 groups/ items that are being tested **

Any help/feedback is greatly appreciated. Please let me know if you need more information. Thanks.