论文部分内容阅读
离散型随机变量的分布列是学习期望、方差的基础,离散型随机变量已经成为高考的热点问题,这部分试题综合性强、应用性广,对同学们运用知识解决问题的能力要求较高.下面谈谈高考中离散型随机变量的分布列的热点考题.1.求离散型随机变量的分布列求离散型随机变量的分布列的步骤:①明确随机变量的所有可能取值以及每个取值所表示的意义;②求出随机变量每个取值对应的概率;③按规范形式写出分布列.
The distribution of discrete random variables is the basis of learning expectation and variance. Discrete random variables have become a hot issue in college entrance examination. This part of the questions is comprehensive and has wide applicability. It requires a high level of ability of students to solve problems with knowledge. The following talk about the distribution of discrete random variable in the college entrance examination hot questions.1. Find the distribution of discrete random variables Listed columns of discrete random variable distribution steps: ① explicit random variables and all possible values Value expressed by the meaning; ② find out the probability of each value of random variables; ③ according to the standard form to write out the distribution column.