The philosophy of the "Analysis and Results" (AR) Tests used in this course is that students should learn to do authentic data analysis and have practice skills in interpreting data when exiting from the course. So these tests ask students to work with more realistic sets of data with a variety of variables and related questions.
Furthermore, we believe that these skills take practice and are not gained in 1 or 2 weeks. These skills need to be practiced in multiple contexts throughout the course. So these tests are cumulative and we often work with "practice tests" during class time to practice these authentic skills.
Research in the cognitive sciences have demonstrated many times over that students have trouble transferring their knowledge across contexts. We think this ability to transfer is precisely what we should work towards in our teaching and use tests to communicate this value to our students.