condition mean min max ZT0-3 35.65 35.65 35.65 ZT4-7 42.3 42.3 42.3 ZT8-11 40.0 40.0 40.0 ZT12-15 53.05 53.05 53.05 ZT16-19 56.35 56.35 56.35 ZT20-23 52.25 52.25 52.25