condition mean min max ZT0-3 16.3 16.3 16.3 ZT4-7 16.9 16.9 16.9 ZT8-11 15.45 15.45 15.45 ZT12-15 32.9 32.9 32.9 ZT16-19 10.35 10.35 10.35 ZT20-23 14.75 14.75 14.75