condition mean min max ZT0-3 35.250924999999995 33.40085 37.101 ZT4-7 39.88845 39.88845 39.88845 ZT8-11 55.466049999999996 55.466049999999996 55.466049999999996 ZT12-15 0 0 0 ZT16-19 65.0432 65.0432 65.0432 ZT20-23 57.5976 57.5976 57.5976