So the total sum of squares is equal to 30.

所以总平方和等于30。

But either way, now that we've calculated it, we can actually figure out the total sum of squares.

但无论哪种方式，现在我们已经计算过了，我们实际上可以计算出总平方和。

Now, the first thing I want to do in this video is calculate the total sum of squares.

现在，我想在本视频中做的第一件事是计算总平方和。

So our total sum of squares-- and actually, if we wanted the variance here, we would divide this by the degrees of freedom.

所以我们的总平方和——实际上，如果我们想要这里的方差， 我们会用它除以自由度。

This is equal to mn minus 1 degrees of freedom, which is exactly the total degrees of freedom we had for the total sum of squares.

这等于 mn 减去 1 个自由度，这恰好是总平方和的总自由度。

What I want to do in this video is to figure out how much of this total sum of squares is due to variation within each group versus variation between the actual groups.

我想在此视频中做的是弄清楚这个总平方和中有多少是由于每个组内的差异与实际组之间的差异引起的。