condition mean min max ZT0-3 32.8 32.8 32.8 ZT4-7 8.9 8.9 8.9 ZT8-11 85.35 85.35 85.35 ZT12-15 19.35 19.35 19.35 ZT16-19 47.65 47.65 47.65 ZT20-23 32.9 32.9 32.9