condition mean min max ZT0-3 59.782423137500004 59.64833108 59.916515195 ZT4-7 36.10238762 34.53822633 37.66654891 ZT8-11 61.936623999999995 47.25932909 76.61391891 ZT12-15 54.18774396 40.129727880000004 68.24576004 ZT16-19 47.6272730175 44.61833954 50.636206494999996 ZT20-23 44.570018245 44.49026571 44.64977078