condition mean min max ZT0-3 0.7606895 0.7606895 0.7606895 ZT4-7 0.6514635 0.6514635 0.6514635 ZT8-11 0.6340165 0.6340165 0.6340165 ZT12-15 0.553164 0.553164 0.553164 ZT16-19 1.207943 1.207943 1.207943 ZT20-23 0.46396950000000003 0.46396950000000003 0.46396950000000003