condition mean min max ZT0-3 0.9171830000000001 0.9171830000000001 0.9171830000000001 ZT4-7 0.57431715 0.57431715 0.57431715 ZT8-11 0.15540965 0.15540965 0.15540965 ZT12-15 0.1455015 0.1455015 0.1455015 ZT16-19 0.5008795 0.5008795 0.5008795 ZT20-23 0.324689 0.324689 0.324689