condition mean min max ZT0-3 0.07572966666666667 0.0 0.227189 ZT4-7 0.314473 0.314473 0.314473 ZT8-11 0.44091800000000003 0.44091800000000003 0.44091800000000003 ZT12-15 0.28964375 0.0 0.5792875 ZT16-19 0.0 0.0 0.0 ZT20-23 0.588544 0.588544 0.588544