condition mean min max ZT0-3 82.25 82.25 82.25 ZT4-7 74.7 74.7 74.7 ZT8-11 28.549999999999997 28.549999999999997 28.549999999999997 ZT12-15 55.5 55.5 55.5 ZT16-19 64.05 64.05 64.05 ZT20-23 92.6 92.6 92.6