What does it mean for an experiment to be random?
A)Assignment into the control and treatment groups is determined by chance.
B)Assignment into the control and treatment groups is determined by the researcher.
C)Assignment into the control and treatment groups is determined by the participants.
D)Assignment into the control and treatment groups is determined by a person who is not involved in the research.

Question

Quizplus · Accepted Answer

Random assignment means that participants are assigned to either the control or treatment group by chance, which helps ensure that any differences observed between the groups are due to the treatment and not some other factor.

What Does It Mean for an Experiment to Be Random