condition mean min max ZT0-3 70.313647 70.313647 70.313647 ZT4-7 49.335296500000005 49.335296500000005 49.335296500000005 ZT8-11 23.831085 23.831085 23.831085 ZT12-15 24.813264500000002 24.813264500000002 24.813264500000002 ZT16-19 23.286263499999997 23.286263499999997 23.286263499999997 ZT20-23 101.3201325 101.3201325 101.3201325