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单词 Cumulative probability
释义

Cumulative probability

原声例句
可汗学院:统计学(视频版)

So from a Z-table's point of view, this Z-table gives you the cumulative probability up to that Z-value.

因此,从 Z 表的角度来看,此 Z 表为您提供了达到该 Z 值的累积概率。

可汗学院:统计学(视频版)

We're not going to look up 95%, because a Z table gives us the cumulative probability up to that critical Z value.

我们不会查找 95%,因为 Z 表为我们提供了达到该临界 Z 值的累积概率。

中文百科

累积分布函数 Cumulative distribution function

(重定向自Cumulative probability)

累积分布函数,又叫分布函数,是概率密度函数的积分,能完整描述一个实随机变量X的概率分布。一般以大写“CDF”(Cumulative Distribution Function)表记。

对于所有实数x ,累积分布函数定义如下:

F(x) = \operatorname{P}(X\leq x)
英语百科

Cumulative distribution function 累积分布函数

(重定向自Cumulative probability)
Cumulative Distribution Function for the normal distribution
From top to bottom, the cumulative distribution function of a discrete probability distribution, continuous probability distribution, and a distribution which has both a continuous part and a discrete part.
Example of the folded cumulative distribution for a normal distribution function with an expected value of 0 and a standard deviation of 1.

In probability theory and statistics, the cumulative distribution function (CDF) of a real-valued random variable X, or just distribution function of X, evaluated at x, is the probability that X will take a value less than or equal to x.

In the case of a continuous distribution, it gives the area under the probability density function from minus infinity to x. Cumulative distribution functions are also used to specify the distribution of multivariate random variables.

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更新时间:2025/6/18 13:38:18