You can have discrete random variables, or continuous.
你可以有离散的随机变量，也可以是连续的。
Discrete Random Variable
原声例句
可汗学院：统计学（视频版）
可汗学院：统计学（视频版）
While, with the discrete random variables, it just took on a finite number of values.
而对于离散随机变量，它只是取了有限数量的值。
可汗学院：统计学（视频版）
You have discrete, so finite meaning you can't have an infinite number of values for a discrete random variable.
你有离散的，所以有限意味着你不能为离散随机变量拥有无限数量的值。
可汗学院：统计学（视频版）
Well, based on how we thought about the probability distribution functions for the discrete random variable, you'd say OK, let's see.
好吧，根据我们对离散随机变量的概率分布函数的看法， 你会说好吧， 让我们看看。
可汗学院：统计学（视频版）
So it's important to realize that a probability distribution function, in this case for a discrete random variable, they all have to add up to 1.
所以重要的是要认识到概率分布函数，在这种情况下对于离散随机变量， 它们都必须加起来为 1。
英语百科
Probability distribution
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In probability and statistics, a probability distribution assigns a probability to each measurable subset of the possible outcomes of a random experiment, survey, or procedure of statistical inference. Examples are found in experiments whose sample space is non-numerical, where the distribution would be a categorical distribution; experiments whose sample space is encoded by discrete random variables, where the distribution can be specified by a probability mass function; and experiments with sample spaces encoded by continuous random variables, where the distribution can be specified by a probability density function. More complex experiments, such as those involving stochastic processes defined in continuous time, may demand the use of more general probability measures.
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