condition mean min max ZT0-3 64.75 64.75 64.75 ZT4-7 126.0 126.0 126.0 ZT8-11 146.2 146.2 146.2 ZT12-15 169.7 169.7 169.7 ZT16-19 104.25 104.25 104.25 ZT20-23 57.7 57.7 57.7