condition mean min max ZT0-3 2778.5 2778.5 2778.5 ZT4-7 2172.3 2172.3 2172.3 ZT8-11 1773.1 1773.1 1773.1 ZT12-15 1772.85 1772.85 1772.85 ZT16-19 2163.95 2163.95 2163.95 ZT20-23 2657.85 2657.85 2657.85