condition mean min max ZT0-3 68.09975 54.23365 81.96585 ZT4-7 14.474049999999998 14.474049999999998 14.474049999999998 ZT8-11 17.837449999999997 17.837449999999997 17.837449999999997 ZT12-15 0 0 0 ZT16-19 29.0363 29.0363 29.0363 ZT20-23 27.13145 27.13145 27.13145