condition mean min max ZT0-3 148.980874 148.980874 148.980874 ZT4-7 43.257946000000004 43.257946000000004 43.257946000000004 ZT8-11 42.9782405 42.9782405 42.9782405 ZT12-15 21.706906 21.706906 21.706906 ZT16-19 12.590994 12.590994 12.590994 ZT20-23 15.3997805 15.3997805 15.3997805