condition mean min max ZT0-3 412.35 412.35 412.35 ZT4-7 335.7 335.7 335.7 ZT8-11 308.1 308.1 308.1 ZT12-15 314.55 314.55 314.55 ZT16-19 477.04999999999995 477.04999999999995 477.04999999999995 ZT20-23 574.5 574.5 574.5