condition mean min max ZT0-3 15.530650000000001 14.03335 17.02795 ZT4-7 24.40295 24.40295 24.40295 ZT8-11 21.91805 21.91805 21.91805 ZT12-15 0 0 0 ZT16-19 21.22045 21.22045 21.22045 ZT20-23 17.118699999999997 17.118699999999997 17.118699999999997