condition mean min max ZT0-3 0.605849 0.605849 0.605849 ZT4-7 0.4228905 0.4228905 0.4228905 ZT8-11 0.38972130000000005 0.38972130000000005 0.38972130000000005 ZT12-15 1.0185155 1.0185155 1.0185155 ZT16-19 1.182525 1.182525 1.182525 ZT20-23 0.7147749999999999 0.7147749999999999 0.7147749999999999