condition mean min max ZT0-3 55.05 55.05 55.05 ZT4-7 65.0 65.0 65.0 ZT8-11 75.3 75.3 75.3 ZT12-15 31.15 31.15 31.15 ZT16-19 49.2 49.2 49.2 ZT20-23 57.9 57.9 57.9