condition mean min max ZT0-3 1761.75 1761.75 1761.75 ZT4-7 1987.5 1987.5 1987.5 ZT8-11 2196.85 2196.85 2196.85 ZT12-15 2192.4 2192.4 2192.4 ZT16-19 2023.15 2023.15 2023.15 ZT20-23 1948.6 1948.6 1948.6