方差分析（analysis of variance，或缩写ANOVA）又称变异数分析，是一种应用非常广泛的统计方法。其主要功能是检验两个或多个样本平均数的差异是否有统计学意义，用以推断它们的总体均值是否相同。-ANOVA (analysis of variance, or the initials ANOVA), also known as the analysis of variability is a very extensive application of statistical methods. Its main function is to test samples from two or more of the average difference whether there are statistically significant, they used to infer the same as the overall average.