数学期望是概率论的一个重要概念，应用数学期望讨论某些经济问题，从而得到一些有意义的结论。
Mathematical expectation is important concept of probability theory, to apply mathematic expectation discuss economic problems, and obtain useful conclusions.
条件数学期望是概率论中一个重要概念，本文通过求数学期望的例子和最优预测探讨了它的应用。
This paper explores the application of conditional expectation in solutions to mathematical expectation and best prediction.
条件数学期望是概率论中一个重要概念，本文通过求数学期望的例子和最优预测探讨了它的应用。
This paper explores the application of conditional expectation in solutions to mathematical expectation and best prediction.
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