condition mean min max ZT0-3 5.4094790435 4.969235762 5.849722325 ZT4-7 7.5409905025 5.728631833 9.353349172 ZT8-11 11.33712672275 9.2970246355 13.37722881 ZT12-15 13.355991513 12.412272191 14.299710834999999 ZT16-19 8.9686054715 8.4031343895 9.5340765535 ZT20-23 10.29061649025 10.26773121 10.3135017705