condition mean min max ZT0-3 334.45 334.45 334.45 ZT4-7 156.3 156.3 156.3 ZT8-11 220.10000000000002 220.10000000000002 220.10000000000002 ZT12-15 210.35 210.35 210.35 ZT16-19 246.5 246.5 246.5 ZT20-23 318.85 318.85 318.85