It works on the normal curve and what this means is that it works so that the majority, 68%, get between 85 and 115 on their IQ test.

它基于正态曲线， 这意味着大多数人，即68%在他们的智商测试中得到85到115之间的分数。

In statistics, pi is used in the equation to calculate the area under a normal distribution curve; which comes in handy for figuring out distributions of standardized test scores, financial models, or margins of error in scientific results.

在统计学中，π 可代入等式中用来计算正态分布曲线下的面积；在计算标准化考试分数、财务模型或科学结果的误差范围时都会用到。