condition mean min max ZT0-3 37.95 37.95 37.95 ZT4-7 19.8 19.8 19.8 ZT8-11 34.15 34.15 34.15 ZT12-15 47.95 47.95 47.95 ZT16-19 38.95 38.95 38.95 ZT20-23 30.7 30.7 30.7