condition mean min max ZT0-3 10.322908 10.322908 10.322908 ZT4-7 11.978034000000001 11.978034000000001 11.978034000000001 ZT8-11 11.690045999999999 11.690045999999999 11.690045999999999 ZT12-15 11.533945 11.533945 11.533945 ZT16-19 10.600809 10.600809 10.600809 ZT20-23 11.533945 11.533945 11.533945