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

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