condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.04891525 0.04891525 0.04891525 ZT8-11 0.049084 0.049084 0.049084 ZT12-15 0 0 0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.049274 0.049274 0.049274