condition mean min max ZT0-3 28.250799999999998 28.250799999999998 28.250799999999998 ZT4-7 63.05 63.05 63.05 ZT8-11 22.96415 22.96415 22.96415 ZT12-15 14.2959 14.2959 14.2959 ZT16-19 13.1752 13.1752 13.1752 ZT20-23 18.9568 18.9568 18.9568