condition mean min max ZT0-3 62.75 62.75 62.75 ZT4-7 45.8 45.8 45.8 ZT8-11 53.05 53.05 53.05 ZT12-15 49.1 49.1 49.1 ZT16-19 39.599999999999994 39.599999999999994 39.599999999999994 ZT20-23 62.349999999999994 62.349999999999994 62.349999999999994