condition mean min max ZT0-3 2233.3999999999996 2233.3999999999996 2233.3999999999996 ZT4-7 2706.2 2706.2 2706.2 ZT8-11 3028.8 3028.8 3028.8 ZT12-15 2847.4 2847.4 2847.4 ZT16-19 2257.9 2257.9 2257.9 ZT20-23 2078.15 2078.15 2078.15