And what does this give us? Well up here, this first, so this is going to be equal to 3 minus 4, difference is 1, you square it, it's actually negative 1, but you square it, you get 1, plus, you get negative 2 squared is 4, plus negative 3 squared, negative 3 squared is 9. And then we have here in the magenta, 5 minus 4 is 1, squared is still 1, 3 minus 4 squared is 1, you square it again, you still get 1, 5 minus 4 is just a 0, well I'll just write the 0 there just to show you that we actually calculated that, and then we have these last 3 data points, 5 minus 4 squared, that's 1, 6 minus 4 squared, that is 4, that's 2 squared, and then plus 7 minus 4 is 3, squared is 9. So what's this going to be equal to? So I have 1 plus 4 plus 9 right over here, that's 5 plus 9, this right over here is 14, and then we also have another 14 right over here, because we have a 1 plus 4 plus 9, so that right over there is also 14, and then we have 2 over here, so it's going to be 28, 14 times 2, 14 plus 14 is 28, plus 2 is 30, is equal to 30. So our total sum of squares, and actually if we wanted the variance here, we would divide this by the degrees of freedom, and we've learned multiple times the degrees of freedom here, so let's say that we have, so we know that we have m groups over here, so let me just write it as m, and I'm not going to prove things rigorously here, but I want to show you where some of these strange formulas that show up in statistics books actually come from, without proving it rigorously, more to give you the intuition. So we have m groups here, and each group here has n members.