So in general, if you have m groups or if you have m means, there are m minus 1 degrees of freedom here. So there's m minus 1 degrees of freedom here. Let me write that. There are m minus 1 degrees of freedom. But with that said, well, in this case, m is 3. So we could say there's 2 degrees of freedom for this exact example. But actually, let's calculate the sum of squares between.