condition mean min max ZT0-3 24.280183333333333 16.788600000000002 37.40815 ZT4-7 129.9665 129.9665 129.9665 ZT8-11 19.256 19.256 19.256 ZT12-15 43.91385 32.7487 55.079 ZT16-19 31.24 31.24 31.24 ZT20-23 28.4634 28.4634 28.4634