condition mean min max ZT0-3 1051.7 1051.7 1051.7 ZT4-7 943.8 943.8 943.8 ZT8-11 767.1 767.1 767.1 ZT12-15 664.9 664.9 664.9 ZT16-19 656.5 656.5 656.5 ZT20-23 702.55 702.55 702.55