condition mean min max ZT0-3 3844.82641 3844.82641 3844.82641 ZT4-7 4131.646137 4131.646137 4131.646137 ZT8-11 3174.592799 3174.592799 3174.592799 ZT12-15 5208.213204 5208.213204 5208.213204 ZT16-19 4230.8927405 4230.8927405 4230.8927405 ZT20-23 848.9799975 848.9799975 848.9799975