condition mean min max ZT0-3 0.030470599999999997 0.030470599999999997 0.030470599999999997 ZT4-7 0.01643655 0.01643655 0.01643655 ZT8-11 0.0112319 0.0112319 0.0112319 ZT12-15 0.01236065 0.01236065 0.01236065 ZT16-19 0.035189866666666667 0.035189866666666667 0.035189866666666667 ZT20-23 0.0639071 0.0639071 0.0639071