condition mean min max ZT0-3 94.80000000000001 94.80000000000001 94.80000000000001 ZT4-7 24.3 24.3 24.3 ZT8-11 28.05 28.05 28.05 ZT12-15 44.400000000000006 44.400000000000006 44.400000000000006 ZT16-19 75.05 75.05 75.05 ZT20-23 70.95 70.95 70.95