condition mean min max ZT0-3 255.8 255.8 255.8 ZT4-7 563.0 563.0 563.0 ZT8-11 533.5 533.5 533.5 ZT12-15 519.95 519.95 519.95 ZT16-19 327.05 327.05 327.05 ZT20-23 228.5 228.5 228.5