condition mean min max ZT0-3 67.63844 67.63844 67.63844 ZT4-7 65.3121835 65.3121835 65.3121835 ZT8-11 108.8235435 108.8235435 108.8235435 ZT12-15 71.0061345 71.0061345 71.0061345 ZT16-19 122.814851 122.814851 122.814851 ZT20-23 107.768484 107.768484 107.768484