condition mean min max ZT0-3 40.3 40.3 40.3 ZT4-7 32.2 32.2 32.2 ZT8-11 71.15 71.15 71.15 ZT12-15 49.2 49.2 49.2 ZT16-19 29.65 29.65 29.65 ZT20-23 57.599999999999994 57.599999999999994 57.599999999999994