condition mean min max ZT0-3 2280.1000000000004 2280.1000000000004 2280.1000000000004 ZT4-7 2301.1 2301.1 2301.1 ZT8-11 1943.9 1943.9 1943.9 ZT12-15 1966.7 1966.7 1966.7 ZT16-19 2074.5 2074.5 2074.5 ZT20-23 2354.8500000000004 2354.8500000000004 2354.8500000000004