does the assumption refer to the values of Y or the residuals of Y? · for a particular group, is it possible to have a strongly non-normal distribution of Y ... ... <看更多>

Descriptives statistics: Objective quantifications help to describe the shape of the distribution and to look for outliers. Shapiro-Wilk test: Statistical test ... ... <看更多>

Normality tests don't do what most think they do. ... The qq-plot shows the distribution is closer to normal than any distribution you are ... ... <看更多>