具体统计方法的往往有其特定的前提假设和适用范围。本文针对总体的正态性假设、两个或多个总体间是否相互独立和数据类型辨析三个角度出发,通过实例阐述统计方法应用中应注意的问题。 Specific statistical methods often have their own specific assumptions and scope of application. In this paper, the general normal hypothesis, whether two or more of the overall independence of each other and the data type of three points of view, through examples to illustrate the application of statistical methods should pay attention to the problem.