condition mean min max ZT0-3 256.3 256.3 256.3 ZT4-7 47.5 47.5 47.5 ZT8-11 183.45 183.45 183.45 ZT12-15 101.65 101.65 101.65 ZT16-19 79.0 79.0 79.0 ZT20-23 60.5 60.5 60.5