网站首页  英汉词典

请输入您要查询的英文单词:

 

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:

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 distribution function)
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.

随便看

 

英汉网英语在线翻译词典收录了3779314条英语词汇在线翻译词条,基本涵盖了全部常用英语词汇的中英文双语翻译及用法,是英语学习的有利工具。

 

Copyright © 2004-2024 encnc.com All Rights Reserved
更新时间:2025/6/18 6:05:17