This is the most famous bell-shaped curve, but there are other ones with different mathematics.

正态分布是最著名的钟形曲线,但仍有其他表达式下的钟形曲线

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To actually apply this it helps to go to something called the normal approximation to the binomial, because it's kind of difficult to compute this formula.

在实际应用这些公式的时候,需要运用二项分布的正态近似定理,因为二项分布公式的值很难计算

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It could be normal, everything, that would be a Gaussian, where if you recall there was a mean, and a standard deviation, and most values were going to be close to the mean.

可能是正态分布，也就是高斯分布，只要有平均值和标准偏差值，你就可以进行调用，大部分的值都是集中在平均值附近的。

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This is called the normal distribution or the Gaussian distribution-- it's a continuous distribution.

这就是正态分布,也叫做高斯分布,这是一个连续分布

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We often assume in finance that random variables, such as returns,are normally distributed.

金融学中我们常假设随机变量,例如收益率,是服从正态分布的

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I didn't use the normal approximation there-- that's obvious--I used the binomial itself.

我显然并没有用到正态分布,我用了二项分布

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I want to--another concept-- I guess I've just been implicit in what I have-- There's a distribution called the normal distribution and that is--I'm sure you've heard of this, right?

另一个概念...,刚才这些我都讲明白了吧...,有一个分布叫正态分布,大家有所耳闻吧

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Well, the mean is always .2 no matter how many policies you write, so it's going to be--we're going to have a normal distribution centered on .2.

不论你签了多少份保单,均值永远是0.2,所以这就是一个关于x=0.2对称的,正态分布

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Then, if n = 100--now I'm going to label this x differently, I'm now going to show the normal bell-shaped curve and I'm going to do this from 0 to .4.

如果n=100,现在我得重新标x值,我现在要画正态分布的钟形曲线了,在这儿用0到0.4

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