condition mean min max ZT0-3 10.34701503075 8.1712405415 12.52278952 ZT4-7 1.66511550775 1.4195624379999998 1.9106685775 ZT8-11 0.9599604722499999 0.86016877 1.0597521744999998 ZT12-15 0.44491451699999995 0.1467939525 0.7430350815 ZT16-19 0.18082819449999998 0.11599080449999999 0.24566558449999998 ZT20-23 0.3774423025 0.346485406 0.408399199