condition mean min max ZT0-3 18.165 18.165 18.165 ZT4-7 13.9698 13.9698 13.9698 ZT8-11 17.96995 17.96995 17.96995 ZT12-15 22.33325 22.33325 22.33325 ZT16-19 23.26765 23.26765 23.26765 ZT20-23 22.65205 22.65205 22.65205