condition mean min max ZT0-3 41.986850000000004 41.986850000000004 41.986850000000004 ZT4-7 36.5094 36.5094 36.5094 ZT8-11 38.62905 38.62905 38.62905 ZT12-15 27.603650000000002 27.603650000000002 27.603650000000002 ZT16-19 32.1414 32.1414 32.1414 ZT20-23 41.74525 41.74525 41.74525