condition mean min max ZT0-3 45.849563 45.849563 45.849563 ZT4-7 75.35888800000001 75.35888800000001 75.35888800000001 ZT8-11 57.708200500000004 57.708200500000004 57.708200500000004 ZT12-15 38.0301815 38.0301815 38.0301815 ZT16-19 23.031425 23.031425 23.031425 ZT20-23 14.1466355 14.1466355 14.1466355