In a final exam in a Biostatistics course, the mean mark of a group of 150 students was 78 and the standard deviation is 8. In Epidemiology exam of the same group, the mean was 73 and the standard deviation was 7.6.
In which group was there a greater dispersion?
Suppose a student scored 75 in Biostatistics and 71 in Epidemiology. In which exam was his relative standing better?