condition mean min max ZT0-3 78.7 78.7 78.7 ZT4-7 91.9 91.9 91.9 ZT8-11 85.2 85.2 85.2 ZT12-15 96.5 96.5 96.5 ZT16-19 36.25 36.25 36.25 ZT20-23 117.15 117.15 117.15