condition mean min max ZT0-3 381.3 381.3 381.3 ZT4-7 522.8 522.8 522.8 ZT8-11 590.9 590.9 590.9 ZT12-15 638.3 638.3 638.3 ZT16-19 472.25 472.25 472.25 ZT20-23 452.1 452.1 452.1