condition mean min max ZT0-3 42.713225 39.926249999999996 45.50020000000001 ZT4-7 26.63955 26.63955 26.63955 ZT8-11 42.090450000000004 42.090450000000004 42.090450000000004 ZT12-15 0 0 0 ZT16-19 48.25405000000001 48.25405000000001 48.25405000000001 ZT20-23 47.7805 47.7805 47.7805