condition mean min max ZT0-3 1021.1 1021.1 1021.1 ZT4-7 1054.3 1054.3 1054.3 ZT8-11 820.2 820.2 820.2 ZT12-15 742.45 742.45 742.45 ZT16-19 816.25 816.25 816.25 ZT20-23 818.5 818.5 818.5