condition mean min max ZT0-3 28.790983333333333 25.3711 35.248850000000004 ZT4-7 26.4881 26.4881 26.4881 ZT8-11 14.62245 14.62245 14.62245 ZT12-15 18.039175 16.086100000000002 19.99225 ZT16-19 19.143 19.143 19.143 ZT20-23 23.78995 23.78995 23.78995