Instead, we squared all the individual velocities, then used the average of those squared values.

相反，我们将各个速度平方， 然后我们使用平均平方值。

And then, this term right here is n times the mean of the x squared values.

然后，此处的此项是 x 平方值的平均值的 n 倍。

That is n times the mean of the squared values of y.

那是 n 乘以 y 的平方值的平均值。

So just to show you that, if I want to take the mean of all of the squared values of the y's-- So that would be this.

所以只是为了向您展示，如果我想取 y 的所有平方值的平均值——那就是这样。

So we can figure out the mean of the squared values of y, the mean of the xy product, the mean of the y's, the mean of the x squareds.

所以我们可以计算出 y 的平方值的平均值，xy 乘积的平均值， y 的平均值， x 平方的平均值。

Well, I like to write it this way, it easier to remember, times whatever value you're trying to get minus the mean of our distribution divided by the standard deviation of our distribution squared.

好吧，我喜欢这样写， 这样更容易记住，乘以你试图得到的任何值减去我们的分布均值除以我们的分布平方的标准差。

So our squared error to the line from the sum of the squared error to the line from the n points is going to be equal to-- this term right here is n times the mean of the y squared values.

所以我们的平方误差到从平方误差的总和到从 n 个点的线的直线将等于——这里的这项是 n 乘以 y 平方值的平均值。