condition mean min max ZT0-3 164.66751666666667 14.080449999999999 446.282 ZT4-7 1025.0065 1025.0065 1025.0065 ZT8-11 528.6345 528.6345 528.6345 ZT12-15 20.150475 17.469450000000002 22.8315 ZT16-19 27.503 27.503 27.503 ZT20-23 4.83085 4.83085 4.83085