condition mean min max ZT0-3 1.1932767499999999 0.9319235000000001 1.4546299999999999 ZT4-7 0.3111425 0.3111425 0.3111425 ZT8-11 0.156868 0.156868 0.156868 ZT12-15 0 0 0 ZT16-19 0.1528714 0.1528714 0.1528714 ZT20-23 0.4611145 0.4611145 0.4611145