1) in this study, they are just setted by author for investigate the effect of class within school. in practice, we can collect class information and make a ANOVA summary table to calculate them.
2) G=(main effect-SE)/main effect
1) in this study, they are just setted by author for investigate the effect of class within school. in practice, we can collect class information and make a ANOVA summary table to calculate them.
2) G=(main effect-SE)/main effect