condition mean min max ZT0-3 573.5 573.5 573.5 ZT4-7 569.5 569.5 569.5 ZT8-11 523.1 523.1 523.1 ZT12-15 418.2 418.2 418.2 ZT16-19 559.5 559.5 559.5 ZT20-23 596.6 596.6 596.6