condition mean min max ZT0-3 65.45 65.45 65.45 ZT4-7 44.8 44.8 44.8 ZT8-11 47.55 47.55 47.55 ZT12-15 49.6 49.6 49.6 ZT16-19 73.9 73.9 73.9 ZT20-23 74.1 74.1 74.1