A skeletal response to a twitter question:
“ANOVA (time point x group) or ANCOVA (group with time point as a covariate) for intervention designs? Discuss.”
follow-up “Only 2 time points in this case (pre- and post-intervention), and would wanna basically answer the question of whether out of the 3 intervention groups, some improve on measure X more than others after the intervention”
Here I compare five methods using fake pre-post data, including
