condition mean min max ZT0-3 519.2 519.2 519.2 ZT4-7 471.8 471.8 471.8 ZT8-11 491.9 491.9 491.9 ZT12-15 472.65 472.65 472.65 ZT16-19 561.6 561.6 561.6 ZT20-23 512.3 512.3 512.3