condition mean min max ZT0-3 29.00995 29.00995 29.00995 ZT4-7 24.9014 24.9014 24.9014 ZT8-11 17.597450000000002 17.597450000000002 17.597450000000002 ZT12-15 18.81005 18.81005 18.81005 ZT16-19 25.00815 25.00815 25.00815 ZT20-23 28.7864 28.7864 28.7864