condition mean min max ZT0-3 57.71805 57.71805 57.71805 ZT4-7 107.01345 107.01345 107.01345 ZT8-11 31.8829 31.8829 31.8829 ZT12-15 18.77535 18.77535 18.77535 ZT16-19 11.590150000000001 11.590150000000001 11.590150000000001 ZT20-23 25.507649999999998 25.507649999999998 25.507649999999998