condition mean min max ZT0-3 9.538025 9.538025 9.538025 ZT4-7 10.5290225 10.5290225 10.5290225 ZT8-11 10.829067 10.829067 10.829067 ZT12-15 10.864594499999999 10.864594499999999 10.864594499999999 ZT16-19 10.998225 10.998225 10.998225 ZT20-23 12.1449655 12.1449655 12.1449655