condition mean min max ZT0-3 1676.0513 1676.0513 1676.0513 ZT4-7 699.5157095 699.5157095 699.5157095 ZT8-11 546.1595575 546.1595575 546.1595575 ZT12-15 852.2307465 852.2307465 852.2307465 ZT16-19 1164.2934265 1164.2934265 1164.2934265 ZT20-23 947.4207994999999 947.4207994999999 947.4207994999999