condition mean min max ZT0-3 40.0 40.0 40.0 ZT4-7 66.8 66.8 66.8 ZT8-11 65.75 65.75 65.75 ZT12-15 55.7 55.7 55.7 ZT16-19 66.55 66.55 66.55 ZT20-23 42.95 42.95 42.95