condition mean min max ZT0-3 43.099999999999994 43.099999999999994 43.099999999999994 ZT4-7 75.0 75.0 75.0 ZT8-11 98.94999999999999 98.94999999999999 98.94999999999999 ZT12-15 65.85 65.85 65.85 ZT16-19 107.65 107.65 107.65 ZT20-23 88.25 88.25 88.25