condition mean min max ZT0-3 33.0 33.0 33.0 ZT4-7 25.4 25.4 25.4 ZT8-11 48.95 48.95 48.95 ZT12-15 51.099999999999994 51.099999999999994 51.099999999999994 ZT16-19 34.8 34.8 34.8 ZT20-23 40.1 40.1 40.1