condition mean min max ZT0-3 0.0150539 0.0 0.0451617 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.066703025 0.04249235 0.0909137 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0