condition mean min max ZT0-3 595.0999999999999 595.0999999999999 595.0999999999999 ZT4-7 739.0 739.0 739.0 ZT8-11 783.2 783.2 783.2 ZT12-15 670.5 670.5 670.5 ZT16-19 564.3499999999999 564.3499999999999 564.3499999999999 ZT20-23 613.65 613.65 613.65