If a researcher randomly assigns subjects to two groups at the beginning of an experiment, we can assume that at that point:
A) the groups will have similar numbers of males and females.
B) the two groups will be similar with respect to IQ.
C) the two groups will be approximately equal in size.
D) all of the above

Question

Quizplus · Accepted Answer

Random assignment in experiments is designed to ensure that each participant has an equal chance of being assigned to any group. This process helps to balance out unknown or unmeasured variables across the groups, such as gender distribution, IQ levels, and group sizes, making the groups as similar as possible on average at the start of the experiment.

If a Researcher Randomly Assigns Subjects to Two Groups at the Beginning