condition mean min max ZT0-3 1.1688555 0.964912 1.372799 ZT4-7 0.7950740000000001 0.7950740000000001 0.7950740000000001 ZT8-11 0.6175855 0.6175855 0.6175855 ZT12-15 0 0 0 ZT16-19 0.8182575 0.8182575 0.8182575 ZT20-23 1.392825 1.392825 1.392825