condition mean min max ZT0-3 25.65 25.65 25.65 ZT4-7 22.2 22.2 22.2 ZT8-11 56.05 56.05 56.05 ZT12-15 23.400000000000002 23.400000000000002 23.400000000000002 ZT16-19 41.599999999999994 41.599999999999994 41.599999999999994 ZT20-23 14.45 14.45 14.45