condition mean min max ZT0-3 93.3 93.3 93.3 ZT4-7 86.9 86.9 86.9 ZT8-11 170.45 170.45 170.45 ZT12-15 106.5 106.5 106.5 ZT16-19 111.45 111.45 111.45 ZT20-23 78.7 78.7 78.7