condition mean min max ZT0-3 45.349999999999994 45.349999999999994 45.349999999999994 ZT4-7 101.7 101.7 101.7 ZT8-11 68.7 68.7 68.7 ZT12-15 78.4 78.4 78.4 ZT16-19 87.4 87.4 87.4 ZT20-23 40.85 40.85 40.85