Due to the bad weather, cotton yield poer mu is very low this year.

由于天气不好，今年棉花的产量很低。

" mu" " k" times " Fn" and the " mu" " k"

" mu" " k" 乘以 " Fn" 并且 " mu" " k" 将是 0.

We learned the population mean was that mu letter.

我们了解到人口均值是那个 mu 字母。

The force of friction is always mu K FN.

摩擦力始终为 mu K FN。

One mu equals roughly 0.067 hectares.

等于 0. 067 公顷。

So pi mu is what we're working on.

所以π是我们正在研究的东西。

So minus mu K so the force of friction--- I'll just put force of friction.

所以减去 mu K 所以摩擦力 --- 我只输入摩擦力。

And actually, we could have just left the mu squared there.

实际上，我们本可以将 mu 平方留在那里。

So this is the Greek letter mu, and we put this k here for kinetic, or we can kind of say moving friction.

k表示" 动" (kinetic)该系数等于摩擦力的大小。

Times mu squared times the sum from i equals 1 to n.

乘以 mu 的平方乘以 i 等于 1 到 n 的总和。

And let's see, minus 2 times mu-- sorry, that mu doesn't look good.

让我们看看，减去 2 乘以 mu-- 抱歉，mu 看起来不太好。

So the mu squared term just gets factorized out.

所以 mu 平方的项刚好被分解了。

I'm interested in understanding this as a function of mu.

我有兴趣将其理解为 mu 的函数。

Similarly, the expected value for  our sum of size 3 is 3 times mu and so on and so forth.

同样，大小 3 的总和的预期值为 mu 的 3 倍，依此类推。

I've got a mu squared term in here, and I've got two things that go in there.

我这里有个 mu 平方项，我有两样东西。

Fx bar given mu and sigma squared.

Fx bar 给定 mu 和 sigma 平方。

This has nothing to do with mu.

这与你无关。

Mu times this whole thing is mu too.

Mu 乘以整个事情也是 mu。

And so, if I wanted to learn mu, all I need to know is X bar.

所以, 如果我想学习mu, 我所需要知道的就是X bar。

And then you see, we have minus 2 mu squared plus mu squared.

然后你看，我们有负 2 平方加上平方。