condition mean min max ZT0-3 4660.549999999999 4660.549999999999 4660.549999999999 ZT4-7 3845.4 3845.4 3845.4 ZT8-11 4084.3500000000004 4084.3500000000004 4084.3500000000004 ZT12-15 4129.65 4129.65 4129.65 ZT16-19 2979.1000000000004 2979.1000000000004 2979.1000000000004 ZT20-23 2981.7 2981.7 2981.7