condition mean min max ZT0-3 228.8 228.8 228.8 ZT4-7 415.2 415.2 415.2 ZT8-11 398.04999999999995 398.04999999999995 398.04999999999995 ZT12-15 356.15 356.15 356.15 ZT16-19 278.85 278.85 278.85 ZT20-23 244.35 244.35 244.35