Find the (a) mean, (b) median, (c) mode, (d) range, (e) midrange, (f) first quartil (g) third quartile, (h) interquartile range, (i) 2nd decile, (j) 60th percentile, (k) me absolute difference. (1) variance and (m) standard deviation of the sample data: Group Class Interval Frequency a) 12.7 - 13.1 13.2 - 13.6 13.7 - 14.1 14.2 - 14.6 14.7 - 15.1 A O U N 15.2 - 15.6 N 15.7 - 16.1 2 8 16.2 - 16.6 2