Sample means to try many different things.

品尝意味着尝试很多不同的东西。

So, " a sample" means a small portion of something you get for free.

因此，“a sample”是指您免费获得的一小部分内容。

" To sample" means to try a small amount of something.

“to sample”是指尝试少量的东西。

" To sample" (sample) means to try something before you buy it.

“抽样” （sample）意味着在购买之前先尝试一下。

It's the sampling distribution of the sample mean.

它是样本均值的抽样分布。

The variance of the sample mean is going to be the variance.

样本均值的方差将是方差。

So let's say we're looking at sample means.

因此，假设我们正在查看样本均值。

So the mean of the sampling distribution of the sample mean, we'll write it like that.

所以样本均值的抽样分布的均值，我们会这样写。

We get a sample mean that is way out here.

我们得到一个样本均值，这是出路。

So we essentially are asking we will run out if our sample mean falls into this bucket over here.

所以我们本质上是在问，如果我们的样本均值落入这里的这个桶中，我们会用完。

So as that approaches infinity, your actual sampling distribution of the sample mean will approach a normal distribution.

因此，当它接近无穷大时，样本均值的实际抽样分布将接近正态分布。

With the last group, sample mean is 6.

对于最后一组，样本均值为 6。

While an x with a line over it means sample mean.

上面有一条线的 x 表示样本均值。

But anyway, so we need to figure out the probability that the sample mean will be more than 2.02 standard deviations above the mean.

但无论如何，我们需要计算样本均值高于均值 2. 02 个标准差的概率。

We're only taking its sample mean into consideration.

我们只考虑其样本均值。

So here, what we're saying is this is the variance of our sample means.

所以在这里，我们所说的是样本均值的方差。

This is the variance of our sample mean.

这是我们样本均值的方差。

But what's neat about this is that the sampling distribution of the sample mean, so you take 50 people, find their mean, plot the frequency.

但这很巧妙的是样本均值的抽样分布，所以你拿 50 个人， 找到他们的均值， 绘制频率。

This is the mean of our sample means.

这是我们样本均值的均值。

We figured out the sample mean-- sorry, we figured out the sample mean right over here.

我们算出了样本均值——抱歉，我们就在这里算出了样本均值。