广西科学2012，Vol.19Issue(3)：234-235,2.
一个离散型随机变量数学期望的计算
Calculation of Mathematical Expectation for a Discrete Random Variable
摘要
Abstract
The mathematical expectation for a discrete random variable was calculated by means of both the defined method and the sum of random variables decomposition. During the calculation process, the defined method has many steps, and the transformation of the formula and computation are flexible, while the sum of random variables decomposition reduces the computational difficulty by using the variable decomposition technique.关键词
随机变量/数学期望/定义法/随机变量和式分解法Key words
andom variable,mathematical expectation,defined method,the sum of random variables decomposition分类
数理科学引用本文复制引用
邓春亮..一个离散型随机变量数学期望的计算[J].广西科学,2012,19(3):234-235,2.基金项目
嘉应学院自然科学研究项目资助. （）
