左右方差计算公式的推导与应用
首发时间:2010-08-24
摘要:随机变量与不同位置特征值离差平方和的平均值是方差的新概念。频数分布客观存在的不对称性使不同位置特征值两边必然存在不相等的左右方差。计算公式涉及到频数比率的分配问题。对此进行推导并通过实例进行演算。
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Left-variance and right-variance of computing formula inference and application
Abstract:Random variables with characteristic values at different positions and the mean value deviation is the variance of the new concept. Frequency distribution of asymmetry objective characteristic value of different positions on both sides there is not necessarily equal the between left-variance and right-variance. Formula involves the allocation of the frequency ratio. Derivation and examples of this for the application of compute.
Keywords: variance frequency ratio mean variance mean left-variance mean right-variance
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