condition mean min max ZT0-3 70.25 70.25 70.25 ZT4-7 42.7 42.7 42.7 ZT8-11 51.05 51.05 51.05 ZT12-15 56.05 56.05 56.05 ZT16-19 38.3 38.3 38.3 ZT20-23 79.15 79.15 79.15