condition mean min max ZT0-3 339.8 339.8 339.8 ZT4-7 404.2 404.2 404.2 ZT8-11 429.65 429.65 429.65 ZT12-15 431.6 431.6 431.6 ZT16-19 433.7 433.7 433.7 ZT20-23 310.05 310.05 310.05