condition mean min max ZT0-3 0.44040019999999996 0.44040019999999996 0.44040019999999996 ZT4-7 0.159685 0.159685 0.159685 ZT8-11 0.0 0.0 0.0 ZT12-15 1.054445 1.054445 1.054445 ZT16-19 0.067012 0.067012 0.067012 ZT20-23 0.8950204666666667 0.8950204666666667 0.8950204666666667