condition mean min max ZT0-3 18.37225 17.4464 19.2981 ZT4-7 12.25805 12.25805 12.25805 ZT8-11 12.65045 12.65045 12.65045 ZT12-15 0 0 0 ZT16-19 16.98445 16.98445 16.98445 ZT20-23 13.527149999999999 13.527149999999999 13.527149999999999