condition mean min max ZT0-3 79.45 79.45 79.45 ZT4-7 87.9 87.9 87.9 ZT8-11 67.25 67.25 67.25 ZT12-15 61.550000000000004 61.550000000000004 61.550000000000004 ZT16-19 60.45 60.45 60.45 ZT20-23 70.6 70.6 70.6