condition mean min max ZT0-3 2962.3999999999996 2962.3999999999996 2962.3999999999996 ZT4-7 3419.6 3419.6 3419.6 ZT8-11 3293.5 3293.5 3293.5 ZT12-15 4148.15 4148.15 4148.15 ZT16-19 3373.8 3373.8 3373.8 ZT20-23 2757.9 2757.9 2757.9