Dr. Gillespie conducts an experiment on childhood aggression. She has two groups in her experiment. She places participants into each group by flipping a coin. Heads places them in group A; tails places them in group B. In this experiment, Dr. Gillespie has satisfied the requirement of.

Explanation:

Dr. Gillespie conducts an experiment on childhood aggression. She has two groups in her experiment. She places participants into each group by flipping a coin. Heads places them in group A; tails places them in group B. In this experiment, Dr. Gillespie has satisfied the requirement of random assignment. This usually a technique during experimentation for assigning two subjects which could be human or an animal. Dr. Gillespie used tow groups accordingly in her experiment in childhood experiment to choose  either group A or B randomly.

answer; i believe that the correct answer is ( troxel v. granville);

elastic potential energy