condition mean min max ZT0-3 88.4 88.4 88.4 ZT4-7 67.7 67.7 67.7 ZT8-11 53.7 53.7 53.7 ZT12-15 43.7 43.7 43.7 ZT16-19 104.8 104.8 104.8 ZT20-23 61.8 61.8 61.8