condition mean min max ZT0-3 54.300000000000004 54.300000000000004 54.300000000000004 ZT4-7 45.3 45.3 45.3 ZT8-11 84.05 84.05 84.05 ZT12-15 55.5 55.5 55.5 ZT16-19 76.0 76.0 76.0 ZT20-23 56.95 56.95 56.95