condition mean min max ZT0-3 94.35 94.35 94.35 ZT4-7 56.1 56.1 56.1 ZT8-11 70.85 70.85 70.85 ZT12-15 138.2 138.2 138.2 ZT16-19 159.4 159.4 159.4 ZT20-23 80.15 80.15 80.15