A psychologist is working with three types of aptitude tests that may be given to prospective management trainees. In deciding how to structure the testing process, an important issue is the possibility of interaction between test takers and test type. If there was no interaction, only one type of test would be needed. Three tests of each type are given to members of each of four groups of subject type. These were distinguished by rating of poor, fair, good, and excellent in preliminary interviews. Which of the exams had the highest mean score?