一种判别离散型随机变量相互独立的新方法  

New Method for Judging the Independence of Two-dimensional Discrete Random Variable

作　　者：张红艳[1] 郝飞龙[1] 李德清[1] 

机构地区：[1]军械工程学院基础部,河北石家庄050003

出　　处：《军械工程学院学报》2011年第6期70-72,共3页Journal of Ordnance Engineering College

摘　　要：对两个离散型随机变量相互独立的问题，通过引入分布律矩阵的概念，借助矩阵理论中行向量的相关结论，提出一种新的判别独立的方法。与以往的方法相比，这种方法更为简单和实用，更重要的是具体操作过程中计算量大为减少。Using the matrix of distribution law and based on some conclusions of row vector, a new method is provided to judge the independence of two-dimensional discrete random variable. Compared with some other methods, this method is an easy and practical tool for judging the independence of two-dimensional discrete random variables. And a lot of work can be saved in the process of judging the independence.

关 键 词：二维离散型随机变量 随机变量的独立性 分布律矩阵 

分 类 号：O211[理学—概率论与数理统计]