condition mean min max ZT0-3 472.79999999999995 472.79999999999995 472.79999999999995 ZT4-7 404.6 404.6 404.6 ZT8-11 461.65000000000003 461.65000000000003 461.65000000000003 ZT12-15 483.75 483.75 483.75 ZT16-19 579.55 579.55 579.55 ZT20-23 635.65 635.65 635.65