condition mean min max ZT0-3 0.19332035 0.02496155 0.3925605 ZT4-7 0.02259075 0.02259075 0.02259075 ZT8-11 0.320934 0.320934 0.320934 ZT12-15 0.381175975 0.25378245 0.5085695 ZT16-19 0.3903025 0.3903025 0.3903025 ZT20-23 0.32064 0.32064 0.32064