condition mean min max ZT0-3 755.9 755.9 755.9 ZT4-7 769.8 769.8 769.8 ZT8-11 641.3 641.3 641.3 ZT12-15 731.35 731.35 731.35 ZT16-19 705.35 705.35 705.35 ZT20-23 627.85 627.85 627.85