condition mean min max ZT0-3 78.3 78.3 78.3 ZT4-7 44.6 44.6 44.6 ZT8-11 54.2 54.2 54.2 ZT12-15 60.599999999999994 60.599999999999994 60.599999999999994 ZT16-19 79.75 79.75 79.75 ZT20-23 94.8 94.8 94.8