condition mean min max ZT0-3 114.456868 114.456868 114.456868 ZT4-7 107.38089249999999 107.38089249999999 107.38089249999999 ZT8-11 136.127819 136.127819 136.127819 ZT12-15 131.018113 131.018113 131.018113 ZT16-19 153.7933235 153.7933235 153.7933235 ZT20-23 126.3794285 126.3794285 126.3794285