Dictionary entry
stochastic variable
noun
随机变量
a variable whose value is subject to random variation; a random variable
常用于概率论与数理统计
In use
A stochastic variable is a quantity whose value depends on the outcome of a random event.
The probability distribution of stochastic variables helps us predict uncertain outcomes.
In this experiment, we treat the number of rainy days as a stochastic variable.
a stochastic variable
用于泛指随机变量。
A stochastic variable is a variable whose value is subject to randomness.
随机变量是其值受随机性影响的变量。
the stochastic variable
用于特指某个已知的随机变量。
The stochastic variable X follows a normal distribution.
随机变量X服从正态分布。
stochastic variable X
常见于数学定义中直接命名。
Let stochastic variable X denote the number of successes.
令随机变量X表示成功次数。
define a stochastic variable
用于描述定义随机变量的过程。
We define a stochastic variable to model the uncertainty.
我们定义一个随机变量来模拟不确定性。
Connections
Confusing words
- random variable
- 随机变量 · 虽然'随机变量'是更常用的表达,但'stochastic variable'是同一概念的学术性同义词,在概率论和统计学中可以互换使用。区别在于:'stochastic variable'更偏重随机过程的随机性,而'random variable'是标准术语。
- stochastic process
- 随机过程 · 'stochastic variable'指单个随机变量,而'stochastic process'指随时间变化的随机变量序列或连续随机现象。混淆发生是因为两者都含'stochastic',且都涉及随机性。
Dictionary facts from ECDICT.