condition mean min max ZT0-3 79.25 79.25 79.25 ZT4-7 38.4 38.4 38.4 ZT8-11 36.25 36.25 36.25 ZT12-15 32.8 32.8 32.8 ZT16-19 60.25 60.25 60.25 ZT20-23 79.6 79.6 79.6