condition mean min max ZT0-3 0.301933 0.2647465 0.3391195 ZT4-7 1.0221 1.0221 1.0221 ZT8-11 0.5420484999999999 0.5420484999999999 0.5420484999999999 ZT12-15 0 0 0 ZT16-19 0.9323549999999999 0.9323549999999999 0.9323549999999999 ZT20-23 1.0743765 1.0743765 1.0743765