condition mean min max ZT0-3 105.05 105.05 105.05 ZT4-7 67.6 67.6 67.6 ZT8-11 47.25 47.25 47.25 ZT12-15 75.3 75.3 75.3 ZT16-19 86.94999999999999 86.94999999999999 86.94999999999999 ZT20-23 109.85 109.85 109.85