condition mean min max ZT0-3 2485.75 2485.75 2485.75 ZT4-7 3408.5 3408.5 3408.5 ZT8-11 3317.1000000000004 3317.1000000000004 3317.1000000000004 ZT12-15 2791.55 2791.55 2791.55 ZT16-19 2512.8500000000004 2512.8500000000004 2512.8500000000004 ZT20-23 2409.05 2409.05 2409.05