condition mean min max ZT0-3 398.609052 398.609052 398.609052 ZT4-7 178.51365900000002 178.51365900000002 178.51365900000002 ZT8-11 93.9624425 93.9624425 93.9624425 ZT12-15 174.930654 174.930654 174.930654 ZT16-19 183.43613449999998 183.43613449999998 183.43613449999998 ZT20-23 280.52318 280.52318 280.52318