condition mean min max ZT0-3 2024.9 2024.9 2024.9 ZT4-7 1725.4 1725.4 1725.4 ZT8-11 2039.85 2039.85 2039.85 ZT12-15 2945.6499999999996 2945.6499999999996 2945.6499999999996 ZT16-19 2593.55 2593.55 2593.55 ZT20-23 2161.75 2161.75 2161.75