Which answer did you get for Case Study 1?
4.5 (sum of the results = 36, divided by 8 patients)
3.6 (sum = 36, divided by 10 patients)
unable to determine with the missing patients
If you said 3.6, that is exactly how traditional grading works if a student misses an assignment and gets a zero. Is it correct to assume that the 2 patients not tested had an antibody response of zero? Is it correct to assume the student knows absolutely nothing about the subject? This is the impact of a zero ... food for thought.