condition mean min max ZT0-3 270.45 270.45 270.45 ZT4-7 611.6 611.6 611.6 ZT8-11 912.85 912.85 912.85 ZT12-15 1116.75 1116.75 1116.75 ZT16-19 800.6999999999999 800.6999999999999 800.6999999999999 ZT20-23 383.05 383.05 383.05