condition mean min max ZT0-3 119.32395 116.6719 121.976 ZT4-7 78.01595 78.01595 78.01595 ZT8-11 47.189499999999995 47.189499999999995 47.189499999999995 ZT12-15 0 0 0 ZT16-19 67.2365 67.2365 67.2365 ZT20-23 106.8955 106.8955 106.8955