And remember, expected value, in a lot of contexts, you could view it as just the arithmetic mean.

请记住，期望值，在很多情况下，您可以将其视为算术平均值。

And then you take the arithmetic mean of those two numbers.

然后你取这两个数字的算术平均值。

But if we're being a little bit more particular, this is the arithmetic mean of this set of numbers.

但如果我们更具体一点，这就是这组数字的算术平均值。

So instead of taking the mean-- let's say how I wanted to calculate the average by taking the arithmetic mean.

因此，与其取平均值，不如说我想如何通过取算术平均值来计算平均值。

If you think about the squared distance from some central tendency, and the best central measure we can have of y is the arithmetic mean.

如果你考虑与某种集中趋势的平方距离，我们可以得到的 y 的最佳集中度量是算术平均值。

So if I take the average of 3 and 3-- I should be particular with my language-- if I take the arithmetic mean of 3 and 3, I get 3.

所以如果我取 3 和 3 的平均值——我应该特别注意我的语言——如果我取 3 和 3 的算术平均值，我得到 3。