30.3 Anova

• computes continuous variable differences between groups

30.3.1 Post-hoc Tukey

In the anova summary, you are looking at the p-value, a small p-value indicates that differences exist between one or more of the groups, however anova doesn’t tell us what those differences actually are, we need to run post hoc tukey tests

summary(anova)

##             Df Sum Sq Mean Sq F value  Pr(>F)    
## Type         3 208009   69336    24.9 2.6e-11 ***
## Residuals   76 211866    2788                    
## ---
## Signif. codes:  0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1