The following data represents the marks of 11 students in group (A) :

The following data represents the marks of 11 students in group (A) :

14, 20, 17, 16, 18, 19, 15, 13, 2, 20, 14, 12

Compute the best central and dispersion measures.

If the central and dispersion measures for the marks of the students in group (B) are as follows:

n	mean	median	mode	s.d	min	max
40	14	13.9	14.1	4.12	12	16	13.43	15.1

Where s.d standard deviation

Which group is better in the sense of homogeneity, group (A) or Group (B)? State the reason of your answer.