离散型随机变量的统计规律性研究

Researches of statistical regularity of discrete random variables

随机变量的统计规律是一个复杂的概念。通过对典型实例的分析研究,揭示出一维离散型随机变量的形成过程及其变化规律。具体描述了样本点与随机变量之间的对应关系及事件与随机变量取值之间的等价关系,得出掷硬币正面出现的"总次数"近似服从正态分布,据此可刻划"掷硬币正面出现"这一随机现象的统计规律性.

Statistical regularity of random variables is a complicated concept. In this article, Establishment details and variation laws of 1 - dimensional discrete random variable were revealed by analyzing typical examples. The correspondence of sample points to random variables was described in detail. The total times of obverse side appearing when spinning a coin were normal distribution, by which the statistical regularity that obverse side appeared when spinning a coin could be depicted.