condition mean min max ZT0-3 44.65 44.65 44.65 ZT4-7 1.8 1.8 1.8 ZT8-11 6.050000000000001 6.050000000000001 6.050000000000001 ZT12-15 46.7 46.7 46.7 ZT16-19 30.95 30.95 30.95 ZT20-23 42.95 42.95 42.95