condition mean min max ZT0-3 16.1331 16.1331 16.1331 ZT4-7 12.04835 12.04835 12.04835 ZT8-11 19.200850000000003 19.200850000000003 19.200850000000003 ZT12-15 32.2525 32.2525 32.2525 ZT16-19 18.8634 18.8634 18.8634 ZT20-23 22.1709 22.1709 22.1709