condition mean min max ZT0-3 40.73408333333333 29.509549999999997 48.09785 ZT4-7 49.64945 49.64945 49.64945 ZT8-11 82.1777 82.1777 82.1777 ZT12-15 145.637 122.714 168.56 ZT16-19 96.5831 96.5831 96.5831 ZT20-23 64.7752 64.7752 64.7752