condition mean min max ZT0-3 56.85 56.85 56.85 ZT4-7 26.4 26.4 26.4 ZT8-11 59.45 59.45 59.45 ZT12-15 49.2 49.2 49.2 ZT16-19 46.45 46.45 46.45 ZT20-23 57.099999999999994 57.099999999999994 57.099999999999994