医学统计学的基本方法（四）潘子昂，王石磷，李占魁四　方差分析方差分析是统计学的基本方法之一，也是科学研究中分析数据的一种重要方法。一个事物，其中有许多因素是互相制约，互相依存的。根据方差加和性原理，将试验结果总方差分解为各因素的方差和误差的方差，然后... The basic methods of medical statistics (4) Pan Ziang, Wang Shi- phosphorus, Li Zhan-kui Four Variance analysis Variance analysis is one of the basic methods of statistics, but also an important method for analyzing data in scientific research. One thing, many of which are mutually restrictive and interdependent. According to the principle of variance additivity, the total variance of the test results is decomposed into the variance of each factor and the variance of the error, and then...