condition mean min max ZT0-3 0.775306 0.775306 0.775306 ZT4-7 0.294065 0.294065 0.294065 ZT8-11 0.44322150000000005 0.44322150000000005 0.44322150000000005 ZT12-15 0.9649365 0.9649365 0.9649365 ZT16-19 1.522705 1.522705 1.522705 ZT20-23 1.1623649999999999 1.1623649999999999 1.1623649999999999