正态分布是典型的钟形曲线，这在统计学中经常出现。
A normal distribution is the classic bell curve that appears so frequently in statistics.
在统计学中，风险管理的标准方法是基于“钟形曲线”（或曰正态分布）的，绝大多数结果分布在中间，极端情况十分罕见。
The standard statistical approach to risk management is based on a “bell curve” or normal distribution, in which most results are in the middle and extremes are rare.
计量资料差异性比较采用单因素方差分析，非正态分布资料经正态转换后再作统计学处理。
Difference of measurement data was compared with single factor analysis of variance. After normal transformation, the non-normal distribution data were conducted with statistical disposal.
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