The analysis plan and interpretation of the results of a complex design experiment involving two independent variables depends on
A) the total number of conditions in the experiment.
B) the number of statistically significant effects in the experiment.
C) whether either independent variable produces a main effect or not.
D) whether an interaction effect is or is not obtained in the experiment.

Question

Quizplus · Accepted Answer

The presence or absence of an interaction effect between the two independent variables is the most important factor in determining the analysis plan and interpretation of the results in a complex design experiment. This is because an interaction effect implies that the effect of one independent variable on the dependent variable is dependent on the level of the other independent variable. Without an interaction effect, the main effects (if present) of each independent variable can be interpreted separately. Therefore, option D is the best choice. However, the other factors mentioned in options A, B and C are also important considerations in the analysis, but not as critical as the presence or absence of an interaction effect.

The Analysis Plan and Interpretation of the Results of a Complex