condition mean min max ZT0-3 0.1104442 0.0636935 0.1781995 ZT4-7 0.057644 0.057644 0.057644 ZT8-11 0.73081 0.73081 0.73081 ZT12-15 0.809434 0.5879829999999999 1.030885 ZT16-19 0.44446549999999996 0.44446549999999996 0.44446549999999996 ZT20-23 0.43871400000000005 0.43871400000000005 0.43871400000000005