Background: Mrs. Adams gave a test to her MAT 150 class that had two versions. The students who took Form A scored an average of 3.6 points higher than those who took Form B. Does this mean form A was easier?

Because the versions were similar and the students were randomly assigned to the two versions, she felt that any difference in scores was simply random chance variation. She also asserted that the students would have had the same score regardless of the version they had taken.What if the students thought that the students who had taken Form A had an unfair advantage? How would they show that?

1. Begin by assuming Mrs. Adams is correct, and that the version of the exam does nothing to the students' scores. Write the hypotheses that we will be testing. Write it in words and symbolically.