condition mean min max ZT0-3 41.0 41.0 41.0 ZT4-7 42.6 42.6 42.6 ZT8-11 46.9 46.9 46.9 ZT12-15 61.099999999999994 61.099999999999994 61.099999999999994 ZT16-19 19.8 19.8 19.8 ZT20-23 42.2 42.2 42.2