condition mean min max ZT0-3 2167.35 2167.35 2167.35 ZT4-7 2202.5 2202.5 2202.5 ZT8-11 2276.6 2276.6 2276.6 ZT12-15 2491.15 2491.15 2491.15 ZT16-19 2289.5 2289.5 2289.5 ZT20-23 1935.75 1935.75 1935.75