英语翻译随机变量的数学期望是用于刻划取值的平均位置或集中位置,随机变量ζ的数学期望也称为数X以概率P为权的加权平均.因此
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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 more 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,Decision tree and the largest expected utility criteria for the application of mathematics in economic decision-making expectations of the important role.

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