Method: Dummy variable is used for analysis of covariance and analysis of variance.

方法：在协方差分析与方差分析中使用哑变量。

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In the traditional financial risk measurement model, the basic method is based on normal distribution, and then the variance-covariance method used to solve the portfolio value at risk.

在传统的金融风险度量模型中，基本都是基于正态分布，然后运用方差一协方差法来求解资产组合的风险价值。

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