condition mean min max ZT0-3 13.3764875 11.273025 15.479949999999999 ZT4-7 4.5229800000000004 4.5229800000000004 4.5229800000000004 ZT8-11 5.249005 5.249005 5.249005 ZT12-15 0 0 0 ZT16-19 12.9749 12.9749 12.9749 ZT20-23 13.342749999999999 13.342749999999999 13.342749999999999