关于正态分布的重要结论及注记

Important conclusion of and notes to normal distribution

实际问题中的许多随机变量服从正态分布,正态分布在概率统计中起着非常重要的作用。从某考研资料中的一道例题出发,给出了关于函数的正态分布的一个结论的证明,使读者对正态分布的理论及实际问题有进一步的认识,进而能够把正态分布应用于解决实际问题中。

In practice, many random variables conform to normal distribution, which plays an inportant role in probability statistics. A problem fror postgraduate entrance examination is selected as an exampl. A conclusion is proved for the normal distribution of the problem＇s function. Thus, the normal distribution will be clearly under- stood and applied to practical problems.