condition mean min max ZT0-3 1039.95 1039.95 1039.95 ZT4-7 771.8 771.8 771.8 ZT8-11 616.95 616.95 616.95 ZT12-15 709.05 709.05 709.05 ZT16-19 848.3 848.3 848.3 ZT20-23 880.4000000000001 880.4000000000001 880.4000000000001