5-5 = 0 5-5 = 0 4-5 = -1 4-4 = 0 2-1 = 1check if your data meets the assumptions of ANOVA. These include normality, homogeneity of variances, and sphericity. You can use tests like Shapiro-Wilk (for normality), Levene's test (for homogeneity of variances), and Mauchly's test (for sphericity) to check these assumptions