Application of Mathematical Expectation in Economical Field

摘要

In the economical field, mathematical expectation is one of the important digital characters of the random variables. Many decision variables in economy problem are random variables; it is difficult to define their concrete distribution. In this study, based on mathematical statistics method and finite difference theory, we resolve the economical decision questions using the mathematical expectation. Moreover, the application of mathematical expectation in economical question was analyzed by example from two aspects of investment decision and sales profits. The results in our analysis show that mathematical expectation plays a great application in production and sales profit.