计算正态分布的分位数，常用于数理统计方面的计算-Normal quantile calculation, commonly used in mathematical statistics calculated

正态分布的一个很好的课件，非那种艰涩的纯抽象讲解，有各种具体的案例，比较适合初学者深刻理解正态分布的内涵(This is a very good courseware handouts to the normal distribution. Instead of common pure abstract explanation, there are a variety of specific cases, more suitable for beginners to understand the

线性回归是利用数理统计中回归分析，来确定两种或两种以上变量间相互依赖的定量关系的一种统计分析方法，运用十分广泛。其表达形式为y = w'x+e，e为误差服从均值为0的正态分布。(Linear regression is a statistical analysis method to determine the quantitative relationship between two or more variables and more than two variables by regres