摘要
通过举例探讨了求随机变量的数学期望和方差的若干方法,有利用于学生进一步了解随机变量数学期望与方差的性质和应用。
In this article,we mainly give some methods how to solve expectation and variance of random variable.We may further understand its properties and some applications on expectation and variance of random variable by some examples.
出处
《安庆师范学院学报(自然科学版)》
2009年第4期89-91,95,共4页
Journal of Anqing Teachers College(Natural Science Edition)
基金
安庆师范学院校级教研项目(2006jy10)资助
关键词
随机变量
数学期望
方差
random variable
expectation
variance