example
if we have two groups of students the group A and the group B
we give the same test to examine them
we give them values for their studies according to a scale of 20

and the numbers for the group A are
17,18,20,14,16,14,18,17,13,17,12,19,13,17,15,19,14,16,17,18,17
group B
20,17,19,15,17,19,16,20,15,17,10,14,9,17,9,20,17,16,20,16,17


in both groups
the major value is the same 17 and the frequency 16,75
the middle is the same 16,75
the mathematical average is the same 16,24


which group has the best result? the A or B and why?
thank you
memas