condition mean min max ZT0-3 547.5 547.5 547.5 ZT4-7 653.0 653.0 653.0 ZT8-11 590.85 590.85 590.85 ZT12-15 502.95 502.95 502.95 ZT16-19 602.25 602.25 602.25 ZT20-23 673.7 673.7 673.7