| 随机变量数学期望与方差 |
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| 引用本文： | 王志刚,胡勋锋. 随机变量数学期望与方差[J]. 海南大学学报(自然科学版), 2009, 27(4): 329-331,335 |
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| 作者姓名： | 王志刚 胡勋锋 |
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| 作者单位： | 海南大学,信息科学技术学院,海南,海口,570228;海南大学,信息科学技术学院,海南,海口,570228 |
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| 基金项目： | 海南省教育厅高等学校研究资助项目，海南省自然科学基金资助项目 |
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| 摘 要： | 介绍一种求随机变量期望与方差的方法,利用该方法容易得到常见随机变量期望与方差公式,并由此证明一些概率不等式和更新过程的基本更新定理.
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| 关 键 词： | 随机变量 数学期望 方差 概率不等式 基本更新定理 |
Expected Value and Variance of Random Variable |
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| WANG Zhi-gang,HU Xun-feng. Expected Value and Variance of Random Variable[J]. Natural Science Journal of Hainan University, 2009, 27(4): 329-331,335 |
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| Authors: | WANG Zhi-gang HU Xun-feng |
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| Affiliation: | (Information Science and Technology College , Hainan University, Haikou 570228, China) |
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| Abstract: | In this paper, a calculation method of the expected value and variance of random variable was introduced. The method was used to obtain some formula of the expected value and variance of random variable, and some probability and moment inequalities and the elementary renewal theorem were proved. |
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| Keywords: | random variable expected value variance probability inequality renewal theorem |
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