condition mean min max ZT0-3 352.159153 352.159153 352.159153 ZT4-7 574.0977435 574.0977435 574.0977435 ZT8-11 677.0298580000001 677.0298580000001 677.0298580000001 ZT12-15 657.6927895 657.6927895 657.6927895 ZT16-19 531.4320925 531.4320925 531.4320925 ZT20-23 341.50038500000005 341.50038500000005 341.50038500000005