condition mean min max ZT0-3 42.10575 42.10575 42.10575 ZT4-7 33.5212 33.5212 33.5212 ZT8-11 37.164249999999996 37.164249999999996 37.164249999999996 ZT12-15 41.4493 41.4493 41.4493 ZT16-19 47.7679 47.7679 47.7679 ZT20-23 47.6332 47.6332 47.6332