condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.5792499999999999 0.5792499999999999 0.5792499999999999 ZT16-19 1.0371983333333332 1.0371983333333332 1.0371983333333332 ZT20-23 1.42915 1.42915 1.42915