condition mean min max ZT0-3 0.36460099999999995 0.171347 0.5541294999999999 ZT4-7 0.335785 0.335785 0.335785 ZT8-11 0.18123650000000002 0.18123650000000002 0.18123650000000002 ZT12-15 0.33467425 0.32444 0.3449085 ZT16-19 0.383118 0.383118 0.383118 ZT20-23 0.8948214999999999 0.8948214999999999 0.8948214999999999