condition mean min max ZT0-3 626.2 626.2 626.2 ZT4-7 372.9 372.9 372.9 ZT8-11 417.35 417.35 417.35 ZT12-15 547.3 547.3 547.3 ZT16-19 814.0 814.0 814.0 ZT20-23 780.55 780.55 780.55