condition mean min max ZT0-3 15.174 15.174 15.174 ZT4-7 10.029620000000001 10.029620000000001 10.029620000000001 ZT8-11 16.9848 16.9848 16.9848 ZT12-15 19.6704 19.6704 19.6704 ZT16-19 20.1756 20.1756 20.1756 ZT20-23 13.33385 13.33385 13.33385