In a random-groups factorial experiment,the most important thing to control is:
A) the ordering of treatment combinations for a given subject
B) the additivity of the effects of the two independent variables
C) the additivity of the independent and dependent variables
D) the equivalence of the groups receiving the various treatment combinations

Question

Quizplus · Accepted Answer

In a random-groups factorial experiment, ensuring the equivalence of the groups receiving the various treatment combinations is crucial. This is because the validity of the experiment's conclusions relies heavily on the assumption that the groups are comparable at the start of the experiment, allowing any differences observed at the end to be attributed to the treatments rather than pre-existing differences between the groups.

In a Random-Groups Factorial Experiment,the Most Important Thing to Control