condition mean min max ZT0-3 2536.25 2536.25 2536.25 ZT4-7 2097.8 2097.8 2097.8 ZT8-11 1957.05 1957.05 1957.05 ZT12-15 1516.35 1516.35 1516.35 ZT16-19 1681.85 1681.85 1681.85 ZT20-23 2248.65 2248.65 2248.65