Task 1: It is common that lecturers obtain reputations for being ‘hard’ or ‘light’ markers (or to use the students’ terminology, ‘evil manifestations from Beelzebub’s bowels’ and ‘nice people’) but there is often little to substantiate these reputations. A group of students investigated the consistency of marking by submitting the same essays to four different lecturers. The mark given by each lecturer was recorded for each of the eight essays. The independent variable was the lecturer who marked the essays and the dependent variable was the percentage mark given. The data are in the file TutorMarks.sav. Conduct a one-way ANOVA on these data by hand. ②