condition mean min max ZT0-3 56.099999999999994 56.099999999999994 56.099999999999994 ZT4-7 69.0 69.0 69.0 ZT8-11 56.1 56.1 56.1 ZT12-15 60.35 60.35 60.35 ZT16-19 51.35 51.35 51.35 ZT20-23 65.05 65.05 65.05