condition mean min max ZT0-3 60.349999999999994 60.349999999999994 60.349999999999994 ZT4-7 96.6 96.6 96.6 ZT8-11 96.9 96.9 96.9 ZT12-15 108.2 108.2 108.2 ZT16-19 88.8 88.8 88.8 ZT20-23 77.65 77.65 77.65