condition mean min max ZT0-3 38.3991 36.090599999999995 40.7076 ZT4-7 25.57715 25.57715 25.57715 ZT8-11 20.0905 20.0905 20.0905 ZT12-15 0 0 0 ZT16-19 22.0701 22.0701 22.0701 ZT20-23 29.0749 29.0749 29.0749