condition mean min max ZT0-3 1793.85 1793.85 1793.85 ZT4-7 1918.9 1918.9 1918.9 ZT8-11 2833.0 2833.0 2833.0 ZT12-15 3313.3999999999996 3313.3999999999996 3313.3999999999996 ZT16-19 2855.75 2855.75 2855.75 ZT20-23 2156.35 2156.35 2156.35