condition mean min max ZT0-3 55.9 55.9 55.9 ZT4-7 91.2 91.2 91.2 ZT8-11 73.1 73.1 73.1 ZT12-15 121.9 121.9 121.9 ZT16-19 34.95 34.95 34.95 ZT20-23 33.1 33.1 33.1