condition mean min max ZT0-3 10.50994 10.407915 10.611965 ZT4-7 13.626850000000001 13.626850000000001 13.626850000000001 ZT8-11 17.25225 17.25225 17.25225 ZT12-15 0 0 0 ZT16-19 25.63445 25.63445 25.63445 ZT20-23 18.255300000000002 18.255300000000002 18.255300000000002