condition mean min max ZT0-3 229.8 229.8 229.8 ZT4-7 261.5 261.5 261.5 ZT8-11 298.05 298.05 298.05 ZT12-15 245.55 245.55 245.55 ZT16-19 126.6 126.6 126.6 ZT20-23 140.25 140.25 140.25