condition mean min max ZT0-3 86.5 86.5 86.5 ZT4-7 49.5 49.5 49.5 ZT8-11 94.95 94.95 94.95 ZT12-15 93.05 93.05 93.05 ZT16-19 61.9 61.9 61.9 ZT20-23 70.75 70.75 70.75