condition mean min max ZT0-3 38.05 38.05 38.05 ZT4-7 31.3 31.3 31.3 ZT8-11 49.65 49.65 49.65 ZT12-15 36.25 36.25 36.25 ZT16-19 34.2 34.2 34.2 ZT20-23 56.400000000000006 56.400000000000006 56.400000000000006