condition mean min max ZT0-3 731.9000000000001 731.9000000000001 731.9000000000001 ZT4-7 919.4 919.4 919.4 ZT8-11 840.8499999999999 840.8499999999999 840.8499999999999 ZT12-15 595.7 595.7 595.7 ZT16-19 412.45000000000005 412.45000000000005 412.45000000000005 ZT20-23 512.2 512.2 512.2