累积分布函数 Cumulative distribution function
(重定向自Cumulative probability distribution function)
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:
单词 | Cumulative probability distribution function |
释义 |
Cumulative probability distribution function
中文百科
累积分布函数 Cumulative distribution function(重定向自Cumulative probability distribution function)
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:
英语百科
Cumulative distribution function 累积分布函数(重定向自Cumulative probability distribution function)
![]() ![]() ![]() 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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