condition mean min max ZT0-3 18.4882 18.4882 18.4882 ZT4-7 25.4285 25.4285 25.4285 ZT8-11 12.449200000000001 12.449200000000001 12.449200000000001 ZT12-15 3.40229 3.40229 3.40229 ZT16-19 8.44586 8.44586 8.44586 ZT20-23 7.51595 7.51595 7.51595