In a 2 x 2 factorial experiment, if the effect of one factor is the same at both levels of the second factor, then
1. both main effects must be significant
2. the experiment is confounded.
3. there is no interaction
4. there is an interaction
In this we have 2 independent variables (IV).
2 X 2 refers to 2 …
This solution is comprised of a detailed explanation on main effect in two factor or two way ANOVA. Full description is given with respect to independent and dependent variable.