1
X is a random variable
常用于定义某量为随机变量。
Height is a random variable.
身高是一个随机变量。
随机变量
random variables — plural of random variable
先理解核心含义，再看它在真实句子里的用法。
随机变量
A variable whose possible values are numerical outcomes of a random phenomenon.
Height is a random variable.
身高是一个随机变量。
主要用于统计学和概率论
其值随机并被赋予概率分布的变量,例如掷骰子的可能结果。
A quantity whose value is random and to which a probability distribution is assigned, such as the possible outcome of a roll of a dice.
The number of heads in ten coin flips is a discrete random variable.
十次抛硬币中正面朝上的次数是一个离散随机变量。
A student's score on a standardized test can be treated as a random variable.
学生在标准化考试中的分数可以被视为一个随机变量。
The waiting time for a bus is a continuous random variable.
等公交车的时间是一个连续随机变量。
常用于定义某量为随机变量。
Height is a random variable.
身高是一个随机变量。
用于描述随机变量的性质。
A random variable that follows a normal distribution is called a normal random variable.
服从正态分布的随机变量称为正态随机变量。
常用于讨论统计特性。
The distribution of a random variable describes its probabilities.
随机变量的分布描述其概率。
Not this
This is random variable.
Use this
This is a random variable.
在英语中，'random variable' 是可数名词短语，通常需要不定冠词 'a' 或 'an'。中文学习者可能遗漏冠词，因为中文没有冠词系统。改正后添加了冠词 'a'，使语法正确。
Not this
There are two random variable.
Use this
There are two random variables.
'random variable' 是可数名词，复数形式要加 -s。中文学习者可能忽略复数变化，因为中文名词没有复数标记。改正后添加了复数标记 -s。
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Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
Use random variables naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from ECDICT, WIKTIONARY.