英语翻译 Random variable is the mathematical expectation value for the characterization of the average location or centralized location，random variable mathematical expectation，also known as X probability P to the right of the weighted average.So mathematical expectation of economic decision-making is an important basis for decision-making.By calculating all decision-making programs mathematical expectation value of the gains or losses can quickly make a decision.Decision program is the largest of mathematical expectation of the program as the best option to decision-making.Know if any one program in each Bi natural conditions(factors)of the Qi，Bi implementation plan arising from the profit value ai，and the natural conditions of the probability Pi，The program is all profit expectations：ai*Pi options in the expected profit Select the largest profit expectations for the best option.Through the introduction of Matrix operations described in mathematical expectation greatest expectations，。
考试反思作文800字 先复习当天所学，再写作业，最后再预习，把不会的地方做圈点标注，第二天问老师，做到日日清。我下次的目标是全年级200名之前，班里前10名，我的赶超对手是xxx。这次考试虽然没有考好，但是我相信，我只要照着我以上的总结去做，我的成绩一定会提高。世上无难事，只怕有心人。
数学期望值计算，英文版，求过程答案 同学，！难道你也在学AP统计？这是个典型的geometric distribution一直重复实验直到第一次成功E=1/pp是成功概率，5/8所以答案为8/5如果要取整数的话是2求采纳
数学建模论文两篇 1 解决中，各个目标的重要性既有层次上的差别，也有在同一层次上不同权重的差别。。[9]李佳鹏，什么是中国标准书号，http：//www.zjxwcb.gov.cn/gb/0702/1905.htm ，2006
高考英语七选五的数学期望是多少？ 今天上数学课的时候，老师说英语的数学期望是25，我就觉得不对啊，听力的数学期望还好求，突然发现七选五…
X服从二项分布，求X平方的数学期望 B（n，p)，EX=np，DX=np(1-p)E【X2】=DX+（EX）2所以E【X2】=np(1-np)+(np)2
