@article{1505, author = "Rui Chen and Liang Fang", abstract = "Mathematical expectation and variance play an important role in economic decision-making. Based on the example of investor selection and the concept of mathematical expectation and variance, this paper analyzes their application methods and steps in economic decision-making and introduces this case into classroom teaching. The results show that mathematical expectation and variance can provide practical methods for economic decision-making, and the case of economic decision makes classroom teaching more practical.", issn = "23495219", journal = "IJIRES", keywords = "Mathematical Expectations, Variance, Economic Decision Making, Investors Choice, Case Teaching", month = "March", number = "2", pages = "230-236", title = "{A} {C}ase {T}eaching {S}tudy of {M}athematics {E}xpectation and {V}ariance", volume = "6", year = "2019", }