condition mean min max ZT0-3 72.8 72.8 72.8 ZT4-7 53.8 53.8 53.8 ZT8-11 53.35 53.35 53.35 ZT12-15 49.7 49.7 49.7 ZT16-19 86.4 86.4 86.4 ZT20-23 70.35 70.35 70.35