condition mean min max ZT0-3 44.7 44.7 44.7 ZT4-7 90.0 90.0 90.0 ZT8-11 49.2 49.2 49.2 ZT12-15 72.35 72.35 72.35 ZT16-19 49.0 49.0 49.0 ZT20-23 56.45 56.45 56.45