condition mean min max ZT0-3 1965.65 1965.65 1965.65 ZT4-7 1825.3 1825.3 1825.3 ZT8-11 1927.15 1927.15 1927.15 ZT12-15 1778.05 1778.05 1778.05 ZT16-19 1667.55 1667.55 1667.55 ZT20-23 1615.0 1615.0 1615.0