condition mean min max ZT0-3 52.7 52.7 52.7 ZT4-7 49.9 49.9 49.9 ZT8-11 28.9 28.9 28.9 ZT12-15 79.55 79.55 79.55 ZT16-19 40.0 40.0 40.0 ZT20-23 40.599999999999994 40.599999999999994 40.599999999999994