condition mean min max ZT0-3 149.377542 149.377542 149.377542 ZT4-7 163.5453295 163.5453295 163.5453295 ZT8-11 189.7808045 189.7808045 189.7808045 ZT12-15 185.411553 185.411553 185.411553 ZT16-19 182.7798555 182.7798555 182.7798555 ZT20-23 215.6934085 215.6934085 215.6934085