condition mean min max ZT0-3 10.860199999999999 10.67155 11.04885 ZT4-7 9.016874999999999 9.016874999999999 9.016874999999999 ZT8-11 10.6607 10.6607 10.6607 ZT12-15 0 0 0 ZT16-19 12.81915 12.81915 12.81915 ZT20-23 12.098749999999999 12.098749999999999 12.098749999999999