condition mean min max ZT0-3 2387.3500000000004 2387.3500000000004 2387.3500000000004 ZT4-7 4395.7 4395.7 4395.7 ZT8-11 4304.5 4304.5 4304.5 ZT12-15 3604.7 3604.7 3604.7 ZT16-19 2899.3999999999996 2899.3999999999996 2899.3999999999996 ZT20-23 2456.4 2456.4 2456.4