condition mean min max ZT0-3 11.312149999999999 11.312149999999999 11.312149999999999 ZT4-7 12.20975 12.20975 12.20975 ZT8-11 8.42657 8.42657 8.42657 ZT12-15 10.83715 10.83715 10.83715 ZT16-19 9.83634 9.83634 9.83634 ZT20-23 10.3128 10.3128 10.3128