condition mean min max ZT0-3 12.2057193285 9.232274442000001 15.179164215 ZT4-7 14.5570196775 14.4565898 14.657449555 ZT8-11 22.468082154999998 17.551035065 27.385129244999998 ZT12-15 24.4898535375 23.914641754999998 25.065065320000002 ZT16-19 36.8238388475 34.00478151 39.642896185 ZT20-23 29.406619055 26.06738677 32.74585134