5 Too Early. The examinations in a large multisection statistics class are scaled after grading so that the mean score is 75. The professor thinks that students in the 8:00 A.M. class have trouble paying attention because they are sleepy and suspects that these students have a lower mean score than the class as a whole. The students in the 8:00 A.M. class this semester can be considered a sample from the population of all students in the course, so the professor compares their mean score with 75. State the hypotheses Ho and H.