condition mean min max ZT0-3 1641.45 1641.45 1641.45 ZT4-7 2124.5 2124.5 2124.5 ZT8-11 2113.05 2113.05 2113.05 ZT12-15 1943.8 1943.8 1943.8 ZT16-19 1977.15 1977.15 1977.15 ZT20-23 1839.2 1839.2 1839.2