condition mean min max ZT0-3 14.123550000000002 13.17985 15.067250000000001 ZT4-7 30.246 30.246 30.246 ZT8-11 43.185249999999996 43.185249999999996 43.185249999999996 ZT12-15 0 0 0 ZT16-19 28.249699999999997 28.249699999999997 28.249699999999997 ZT20-23 19.716050000000003 19.716050000000003 19.716050000000003