But calculating the average probability for a group is much easier than calculating the same probability for any individual.

但计算群体的平均概率要比计算个体的概率容易得多。

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But they're accountable and we can list all possible values when they're discrete and form a probability weighted average of the outcomes.

但随机变量是离散的话,我们可以把所有的可能值列出来,然后算出加权平均值

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Another important concept in probability theory that we will use a lot is expected value, the mean, or average-- those are all roughly interchangeable concepts.

概率论中另外一个常用的重要的概念是,期望值或者也叫均值,这两个概念可以互换

耶鲁公开课 - 金融市场课程节选

But calculating the average probability for a group is much easier than calculating the same probability for any individual.

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The volunteers were then told the actual average probability of the event.

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The average probability of default translates to a B credit rating, according to Sageworks, the provider of the Business Credit Report by Sageworks.

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