condition mean min max ZT0-3 25.3606257525 23.609789295 27.11146221 ZT4-7 29.3143208025 29.1960737 29.432567905 ZT8-11 42.9861515825 34.383569890000004 51.588733275 ZT12-15 70.63714375 64.66775416 76.60653334 ZT16-19 86.9962926 85.59831538499999 88.394269815 ZT20-23 70.465529755 66.9881297 73.94292981