condition mean min max ZT0-3 1004.8 1004.8 1004.8 ZT4-7 645.3 645.3 645.3 ZT8-11 672.45 672.45 672.45 ZT12-15 711.25 711.25 711.25 ZT16-19 935.35 935.35 935.35 ZT20-23 1121.0 1121.0 1121.0