condition mean min max ZT0-3 118.094224 118.094224 118.094224 ZT4-7 120.4663655 120.4663655 120.4663655 ZT8-11 107.14832150000001 107.14832150000001 107.14832150000001 ZT12-15 122.557446 122.557446 122.557446 ZT16-19 115.1762525 115.1762525 115.1762525 ZT20-23 92.2143155 92.2143155 92.2143155