condition mean min max ZT0-3 32.1 32.1 32.1 ZT4-7 42.0 42.0 42.0 ZT8-11 4.75 4.75 4.75 ZT12-15 36.35 36.35 36.35 ZT16-19 16.05 16.05 16.05 ZT20-23 26.950000000000003 26.950000000000003 26.950000000000003