condition mean min max ZT0-3 42.413075 41.9054 42.92075 ZT4-7 26.69865 26.69865 26.69865 ZT8-11 38.65235 38.65235 38.65235 ZT12-15 0 0 0 ZT16-19 43.0009 43.0009 43.0009 ZT20-23 44.353350000000006 44.353350000000006 44.353350000000006