condition mean min max ZT0-3 37.65 37.65 37.65 ZT4-7 4.3 4.3 4.3 ZT8-11 42.7 42.7 42.7 ZT12-15 40.95 40.95 40.95 ZT16-19 42.75 42.75 42.75 ZT20-23 6.300000000000001 6.300000000000001 6.300000000000001