condition mean min max ZT0-3 107.7 107.7 107.7 ZT4-7 151.4 151.4 151.4 ZT8-11 227.25 227.25 227.25 ZT12-15 42.25 42.25 42.25 ZT16-19 72.0 72.0 72.0 ZT20-23 125.05 125.05 125.05