condition mean min max ZT0-3 0.29501449999999996 0.21303899999999998 0.37699 ZT4-7 0.14827774999999999 0.14827774999999999 0.14827774999999999 ZT8-11 0.6593789999999999 0.6593789999999999 0.6593789999999999 ZT12-15 0 0 0 ZT16-19 0.4608905 0.4608905 0.4608905 ZT20-23 0.504258 0.504258 0.504258