Standard Variance Average Ratio 标准方差均值比
The average size is 3,131 square feet, with a standard deviation of 655 square feet. (Standard deviation is a statistical measure of variance.)
平均大小为 3,131 平方英尺，标准偏差为 655 平方英尺（标准偏差是一个描述差异的统计量度）。
Furthermore, the average, variance and standard deviation are processed to testify the existence, occurrence stability and influence of each hypothetical role.
进而得出每种假设角色的平均值，方差及标准差验证该假设角色的存在性、出现频率的稳定性以及对各个片断的影响程度。
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