condition mean min max ZT0-3 331.54999999999995 331.54999999999995 331.54999999999995 ZT4-7 595.9 595.9 595.9 ZT8-11 620.8 620.8 620.8 ZT12-15 477.70000000000005 477.70000000000005 477.70000000000005 ZT16-19 394.35 394.35 394.35 ZT20-23 405.75 405.75 405.75