condition mean min max ZT0-3 16.50885 16.50885 16.50885 ZT4-7 24.832900000000002 24.832900000000002 24.832900000000002 ZT8-11 23.444699999999997 23.444699999999997 23.444699999999997 ZT12-15 16.6169 16.6169 16.6169 ZT16-19 11.55845 11.55845 11.55845 ZT20-23 15.15795 15.15795 15.15795