condition mean min max ZT0-3 41.599999999999994 41.599999999999994 41.599999999999994 ZT4-7 57.1 57.1 57.1 ZT8-11 26.55 26.55 26.55 ZT12-15 47.5 47.5 47.5 ZT16-19 102.45 102.45 102.45 ZT20-23 59.05 59.05 59.05