Background: A community tutoring service is run for middle school students and employ four tutors, to whom students are randomly assigned. Once assigned, students continue to work with the same tutor. Every spring, the students take a standardized test, scoring out of a possible 100 points. You want to know if some tutors get better test results for their students. A one-way ANOVA is doe on the test scores, and scores among your four tutors are indeed different (p<0.0001). You therefore compare the tutors to each other and use a Tukey adjustment.