condition mean min max ZT0-3 37.49865 37.49865 37.49865 ZT4-7 35.8226 35.8226 35.8226 ZT8-11 16.885800000000003 16.885800000000003 16.885800000000003 ZT12-15 20.52265 20.52265 20.52265 ZT16-19 22.533050000000003 22.533050000000003 22.533050000000003 ZT20-23 32.461600000000004 32.461600000000004 32.461600000000004