condition mean min max ZT0-3 5.252482499999999 4.004905 6.5000599999999995 ZT4-7 3.4928299999999997 3.4928299999999997 3.4928299999999997 ZT8-11 1.4470100000000001 1.4470100000000001 1.4470100000000001 ZT12-15 0 0 0 ZT16-19 1.004162 1.004162 1.004162 ZT20-23 4.94553 4.94553 4.94553