condition mean min max ZT0-3 2247.4 2247.4 2247.4 ZT4-7 2758.5 2758.5 2758.5 ZT8-11 2993.6499999999996 2993.6499999999996 2993.6499999999996 ZT12-15 2747.2 2747.2 2747.2 ZT16-19 2587.9 2587.9 2587.9 ZT20-23 2382.85 2382.85 2382.85